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563:. He further conjectured that each cohomology class should have a distinguished representative with the property that both it and its dual vanish under the exterior derivative operator; these are now called harmonic forms. Hodge devoted most of the 1930s to this problem. His earliest published attempt at a proof appeared in 1933, but he considered it "crude in the extreme". 2786: 5563:
This example suggests several different roles played by Hodge theory in complex algebraic geometry. First, Hodge theory gives restrictions on which topological spaces can have the structure of a smooth complex projective variety. Second, Hodge theory gives information about the moduli space of smooth
807: 567:, one of the most brilliant mathematicians of the era, found himself unable to determine whether Hodge's proof was correct or not. In 1936, Hodge published a new proof. While Hodge considered the new proof much superior, a serious flaw was discovered by Bohnenblust. Independently, Hermann Weyl and 575:
In retrospect it is clear that the technical difficulties in the existence theorem did not really require any significant new ideas, but merely a careful extension of classical methods. The real novelty, which was Hodge’s major contribution, was in the conception of harmonic integrals and their
2348: 2648: 1499: 259:, and that therefore each of the terms on the left-hand side are vector space duals of one another. In contemporary language, de Rham's theorem is more often phrased as the statement that singular cohomology with real coefficients is isomorphic to de Rham cohomology: 554:
Hodge felt that these techniques should be applicable to higher dimensional varieties as well. His colleague Peter Fraser recommended de Rham's thesis to him. In reading de Rham's thesis, Hodge realized that the real and imaginary parts of a holomorphic 1-form on a
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is a positive volume form, from which Lefschetz was able to rederive Riemann's inequalities. In 1929, W. V. D. Hodge learned of Lefschetz's paper. He immediately observed that similar principles applied to algebraic surfaces. More precisely, if
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A crucial point is that the Hodge decomposition is a decomposition of cohomology with complex coefficients that usually does not come from a decomposition of cohomology with integral (or rational) coefficients. As a result, the intersection
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This decomposition is in fact independent of the choice of Kähler metric (but there is no analogous decomposition for a general compact complex manifold). On the other hand, the Hodge decomposition genuinely depends on the structure of
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showed that the intersection homology of any complex projective variety (not necessarily smooth) has a pure Hodge structure, just as in the smooth case. In fact, the whole Kähler package extends to intersection homology.
1569: 143:, in which he suggested — but did not prove — that differential forms and topology should be linked. Upon reading it, Georges de Rham, then a student, was inspired. In his 1931 thesis, he proved a result now called 3449: 2233: 2781:{\displaystyle {\begin{aligned}{\mathcal {E}}^{\bullet }&=\bigoplus \nolimits _{i}\Gamma (E_{i})\\L&=\bigoplus \nolimits _{i}L_{i}:{\mathcal {E}}^{\bullet }\to {\mathcal {E}}^{\bullet }\end{aligned}}} 1660: 2935: 496: 445: 1747: 2525: 5008: 2202: 1271: 1132: 3731: 1395: 5595:, extends Hodge theory to all complex algebraic varieties, not necessarily smooth or compact. Namely, the cohomology of any complex algebraic variety has a more general type of decomposition, a 3062: 2653: 4365:
The "Kähler package" is a powerful set of restrictions on the cohomology of smooth complex projective varieties (or compact Kähler manifolds), building on Hodge theory. The results include the
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of a smooth complex projective variety (or compact Kähler manifold) are even, by Hodge symmetry. This is not true for compact complex manifolds in general, as shown by the example of the
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of an elliptic operator on a closed manifold is always a finite-dimensional vector space. Another consequence of the Hodge theorem is that a Riemannian metric on a closed manifold
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relevance to algebraic geometry. This triumph of concept over technique is reminiscent of a similar episode in the work of Hodge’s great predecessor Bernhard Riemann.
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is dual to a cohomology class which we will call , and the cap product can be computed by taking the cup product of and α and capping with the fundamental class of
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A fundamental aspect of complex geometry is that there are continuous families of non-isomorphic complex manifolds (which are all diffeomorphic as real manifolds).
165: 5450: 5118: 874: 265: 5712: 5692: 5664: 5644: 5424: 5396: 5228: 5185: 5161: 5141: 5085: 5061: 4817: 4793: 4522: 4499: 4479: 4459: 3495: 802:{\displaystyle 0\to \Omega ^{0}(M)\xrightarrow {d_{0}} \Omega ^{1}(M)\xrightarrow {d_{1}} \cdots \xrightarrow {d_{n-1}} \Omega ^{n}(M)\xrightarrow {d_{n}} 0,} 2544: 97:, is encompassed by the latter case. Hodge theory has become an important tool in algebraic geometry, particularly through its connection to the study of 989: 2819: 1967: 3106: 4377:. Many of these results follow from fundamental technical tools which may be proven for compact Kähler manifolds using Hodge theory, including the 559:
were in some sense dual to each other. He suspected that there should be a similar duality in higher dimensions; this duality is now known as the
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Because is a cohomology class, it has a Hodge decomposition. By the computation we did above, if we cup this class with any class of type
2343:{\displaystyle \Omega ^{k}(M)\cong \operatorname {im} d_{k-1}\oplus \operatorname {im} \delta _{k+1}\oplus {\mathcal {H}}_{\Delta }^{k}(M).} 571:
modified Hodge's proof to repair the error. This established Hodge's sought-for isomorphism between harmonic forms and cohomology classes.
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Huybrechts (2005), sections 3.3 and 5.2; Griffiths & Harris (1994), sections 0.7 and 1.2; Voisin (2007), v. 1, ch. 6, and v. 2, ch. 1.
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from Chow groups to ordinary cohomology, but Hodge theory also gives information about the kernel of the cycle map, for example using the
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holds, meaning that the variety is determined up to isomorphism by its Hodge structure. Finally, Hodge theory gives information about the
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De Rham's original statement is then a consequence of the fact that over the reals, singular cohomology is the dual of singular homology.
3357: 1584: 2893: 455: 404: 1679: 2453: 1494:{\displaystyle (\omega ,\tau )\mapsto \langle \omega ,\tau \rangle :=\int _{M}\langle \omega (p),\tau (p)\rangle _{p}\sigma .} 6145: 6064: 5990: 4956: 2160: 1219: 1080: 4031:). These are important invariants of a smooth complex projective variety; they do not change when the complex structure of 3656: 551:
itself must represent a non-zero cohomology class, so its periods cannot all be zero. This resolved a question of Severi.
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is varied continuously, and yet they are in general not topological invariants. Among the properties of Hodge numbers are
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are the sum of the Hodge numbers in a given row. A basic application of Hodge theory is then that the odd Betti numbers
3292:{\displaystyle f\,dz_{1}\wedge \cdots \wedge dz_{p}\wedge d{\overline {w_{1}}}\wedge \cdots \wedge d{\overline {w_{q}}}} 5774: 5091: 4086: 3883: 6094: 6023: 5956: 1344: 6119: 6086: 6015: 4374: 2073:
has a unique harmonic representative. Concretely, the harmonic representative is the unique closed form of minimum
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For example, the Hodge theorem implies that the cohomology groups with real coefficients of a closed manifold are
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There is also a Hodge decomposition in this situation, generalizing the statement above for the de Rham complex.
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The Hodge numbers of a smooth complex projective variety (or compact Kähler manifold) can be listed in the
55: 5207:. The difficulty of the Hodge conjecture reflects the lack of understanding of such integrals in general. 4943:{\displaystyle (H^{2p}(X,\mathbb {Z} )/{\text{torsion}})\cap H^{p,p}(X)\subseteq H^{2p}(X,\mathbb {C} )} 3489:
in cohomology, so the cup product with complex coefficients is compatible with the Hodge decomposition:
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as a generalization of the de Rham complex. The Hodge theorem extends to this setting, as follows. Let
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is big. In short, the Hodge conjecture predicts that the possible "shapes" of complex subvarieties of
521: 3833: 3643: 3188:, meaning forms that can locally be written as a finite sum of terms, with each term taking the form 3160: 3958: 1926:
say that the electromagnetic field in a vacuum, i.e. absent any charges, is represented by a 2-form
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of their cohomology classes is zero, and when made explicit, this gave Lefschetz a new proof of the
3099: 1908:{\displaystyle {\mathcal {H}}_{\Delta }^{k}(M)=\{\alpha \in \Omega ^{k}(M)\mid \Delta \alpha =0\}.} 6163: 5541: 4756: 2092:. (Admittedly, there are other ways to prove this.) Indeed, the operators Δ are elliptic, and the 1145: 5733: 3118: 3109:, complex projective manifolds are automatically algebraic: they are defined by the vanishing of 2354: 1803:
This is a second-order linear differential operator, generalizing the Laplacian for functions on
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set of components, each of complex dimension 19. The subspace of K3 surfaces with Picard number
5306: 5120:(even integrally, that is, without the need for a positive integral multiple in the statement). 4714: 4621: 2077:
norm that represents a given cohomology class. The Hodge theorem was proved using the theory of
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inner product is then defined as the integral of the pointwise inner product of a given pair of
4420: 4370: 3110: 2531: 135:, and the interaction between differential forms and topology was poorly understood. In 1928, 2052: 245:{\displaystyle H_{k}(M;\mathbf {R} )\times H_{\text{dR}}^{k}(M;\mathbf {R} )\to \mathbf {R} .} 6182: 5748: 5604: 5596: 5577: 5204: 5087:(the combination of integral cohomology with the Hodge decomposition of complex cohomology). 5013: 3798: 1320: 641: 501: 5928: 4571:. Moreover, the resulting class has a special property: its image in the complex cohomology 1186: 960:{\displaystyle H^{k}(M,\mathbf {R} )\cong {\frac {\ker d_{k}}{\operatorname {im} d_{k-1}}}.} 6155: 6111: 6104: 6074: 6033: 6000: 5966: 3320: 3002:
The cohomology of the complex is canonically isomorphic to the space of harmonic sections,
2121: 1919: 342:{\displaystyle H_{\text{sing}}^{k}(M;\mathbf {R} )\cong H_{\text{dR}}^{k}(M;\mathbf {R} ).} 144: 5429: 4378: 8: 5097: 4190: 3737: 2942: 1504:
Naturally the above inner product induces a norm, when that norm is finite on some fixed
861: 820: 560: 113: 86: 3816: 3624:{\displaystyle \smile \colon H^{p,q}(X)\times H^{p',q'}(X)\rightarrow H^{p+p',q+q'}(X).} 5827: 5697: 5677: 5649: 5629: 5572:
of algebraic cycles on a given variety. The Hodge conjecture is about the image of the
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complex projective varieties with a given topological type. The best case is when the
5374:. Their intersection can have rank anywhere between 1 and 20; this rank is called the 3134: 90: 6141: 6090: 6060: 6019: 6007: 5986: 5952: 5940: 5617: 5196: 5164: 4424: 4057: 3769: 3475: 2078: 629: 394: 356: 152: 59: 47: 1063:{\displaystyle \Omega ^{k}(M)=\Gamma \left(\bigwedge \nolimits ^{k}T^{*}(M)\right).} 6131: 6123: 6052: 5819: 5723: 4436: 3095: 2373: 2109: 2093: 2082: 1666: 1213: 568: 360: 119:
have given alternative proofs of, or analogous results to, classical Hodge theory.
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is an isomorphism of vector spaces. In other words, each real cohomology class on
6151: 6100: 6070: 6029: 5996: 5962: 5743: 5714:, as would arise from a family of varieties which need not be smooth or compact. 5565: 5200: 4186: 3149: 3077: 2880:{\displaystyle {\mathcal {H}}=\{e\in {\mathcal {E}}^{\bullet }\mid \Delta e=0\}.} 2140: 2038:{\displaystyle \varphi :{\mathcal {H}}_{\Delta }^{k}(M)\to H^{k}(M,\mathbf {R} )} 1950: 1939: 828: 610: 556: 256: 98: 78: 36: 5602:
A different generalization of Hodge theory to singular varieties is provided by
5974: 5844: 5667: 5609: 5592: 3064:, in the sense that each cohomology class has a unique harmonic representative. 2436: 2365: 2113: 1135: 580: 105: 6136: 6127: 136: 6176: 6056: 6040: 5728: 5375: 4339: 4079: 3336: 3087: 2101: 1074: 382: 109: 2813:. As in the de Rham case, this yields the vector space of harmonic sections 2081:
partial differential equations, with Hodge's initial arguments completed by
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Taking wedge products of these harmonic representatives corresponds to the
1564:{\displaystyle \langle \omega ,\omega \rangle =\|\omega \|^{2}<\infty ,} 625: 564: 2150:. This says that there is a unique decomposition of any differential form 5753: 5674:
is a generalization. Roughly speaking, a mixed Hodge module on a variety
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describes how the Hodge structure of a smooth complex projective variety
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was still nascent in the 1920s. It had not yet developed the notion of
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Lefschetz, Solomon (1927). "Correspondences Between Algebraic Curves".
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components of a harmonic form are again harmonic. Therefore, for any
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with complex coefficients as a direct sum of complex vector spaces:
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which has a strong compatibility with the complex structure, making
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on a closed Riemannian manifold as a sum of three parts in the form
780: 738: 718: 682: 5188: 3444:{\displaystyle H^{r}(X,\mathbf {C} )=\bigoplus _{p+q=r}H^{p,q}(X).} 1574:
then the integrand is a real valued, square integrable function on
5756:, a key consequence of Hodge theory for compact Kähler manifolds. 5560:, but for "special" K3 surfaces the intersection can be bigger.) 1655:{\displaystyle \|\omega (p)\|_{p}:M\to \mathbf {R} \in L^{2}(M).} 3159:(with complex coefficients) can be written uniquely as a sum of 3071: 2538:
sections of these vector bundles, and that the induced sequence
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While Hodge theory is intrinsically dependent upon the real and
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As originally stated, de Rham's theorem asserts that this is a
6118:, Graduate Texts in Mathematics, vol. 65 (3rd ed.), 5452:. (Thus, for most projective K3 surfaces, the intersection of 583:, William Vallance Douglas Hodge, 17 June 1903 – 7 July 1975, 5187:. In this sense, Hodge theory is related to a basic issue in 4461:
be a smooth complex projective variety. A complex subvariety
2930:{\displaystyle H:{\mathcal {E}}^{\bullet }\to {\mathcal {H}}} 452:
is a non-zero holomorphic form on an algebraic surface, then
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as a complex manifold (not on the choice of Kähler metric):
491:{\displaystyle {\sqrt {-1}}\,\omega \wedge {\bar {\omega }}} 440:{\displaystyle {\sqrt {-1}}\,\omega \wedge {\bar {\omega }}} 5143:
describes the integrals of algebraic differential forms on
3773: 1742:{\displaystyle \delta :\Omega ^{k+1}(M)\to \Omega ^{k}(M).} 868:
with real coefficients is computed by the de Rham complex:
5851:, Biogr. Mem. Fellows R. Soc., 1976, vol. 22, pp. 169–192. 5849:
William Vallance Douglas Hodge, 17 June 1903 – 7 July 1975
5191:: there is in general no "formula" for the integral of an 4775:-linear combination of classes of complex subvarieties of 5666:
varies. In geometric terms, this amounts to studying the
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Python code for computing Hodge numbers of hypersurfaces
2520:{\displaystyle L_{i}:\Gamma (E_{i})\to \Gamma (E_{i+1})} 73:
The theory was developed by Hodge in the 1930s to study
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associated to a family of varieties. Saito's theory of
5003:{\displaystyle H^{2p}(X,\mathbb {Z} )/{\text{torsion}}} 4711:
whose image in complex cohomology lies in the subspace
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metric on differential forms, this gives an orthogonal
2197:{\displaystyle \omega =d\alpha +\delta \beta +\gamma ,} 1578:, evaluated at a given point via its point-wise norms, 6083:
Foundations of Differentiable Manifolds and Lie Groups
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On the other hand, the integral can be written as the
3642:) of the Hodge decomposition can be identified with a 1266:{\displaystyle \bigwedge \nolimits ^{k}(T_{p}^{*}(M))} 1127:{\displaystyle \bigwedge \nolimits ^{k}(T_{p}^{*}(M))} 6045:
Hodge Theory and Complex Algebraic Geometry (2 vols.)
5700: 5680: 5652: 5632: 5544: 5502: 5458: 5432: 5412: 5384: 5351: 5309: 5280: 5236: 5216: 5173: 5149: 5129: 5100: 5073: 5049: 5016: 4959: 4832: 4805: 4781: 4759: 4717: 4670: 4624: 4618:
lies in the middle piece of the Hodge decomposition,
4577: 4530: 4510: 4487: 4467: 4447: 4388: 3961: 3886: 3836: 3801: 3726:{\displaystyle H^{p,q}(X)\cong H^{q}(X,\Omega ^{p}),} 3659: 3498: 3360: 3197: 3008: 2896: 2822: 2651: 2547: 2456: 2439:, equipped with metrics, on a closed smooth manifold 2382: 2360: 2236: 2163: 2055: 1970: 1824: 1765: 1682: 1587: 1517: 1398: 1347: 1323: 1279: 1222: 1189: 1148: 1083: 992: 877: 652: 524: 504: 458: 407: 268: 168: 5210:
Example: For a smooth complex projective K3 surface
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Biographical Memoirs of Fellows of the Royal Society
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are holomorphic differentials on an algebraic curve
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Sur les nombres de Betti des espaces de groupes clos
93:. Hodge's primary motivation, the study of complex 5063:(as described by cohomology) are determined by the 4753:should have a positive integral multiple that is a 3057:{\displaystyle H(E_{j})\cong {\mathcal {H}}(E_{j})} 2642:is an elliptic complex. Introduce the direct sums: 2353:The Hodge decomposition is a generalization of the 5772: 5706: 5686: 5658: 5638: 5552: 5530: 5488: 5444: 5418: 5390: 5366: 5337: 5295: 5266: 5222: 5179: 5155: 5135: 5112: 5079: 5055: 5035: 5002: 4942: 4811: 4787: 4767: 4745: 4703: 4652: 4610: 4563: 4516: 4493: 4473: 4453: 4406: 4023:) means the dimension of the complex vector space 4001: 3947: 3872: 3807: 3725: 3623: 3443: 3291: 3056: 2929: 2879: 2780: 2631: 2519: 2427: 2342: 2196: 2061: 2037: 1907: 1792: 1741: 1654: 1563: 1493: 1381: 1329: 1301: 1265: 1205: 1175: 1126: 1062: 959: 801: 591: 539: 510: 490: 439: 389:has only one complex dimension; consequently, the 341: 244: 5979:The Theory and Applications of Harmonic Integrals 3948:{\displaystyle H^{2n}(X,\mathbb {C} )=H^{n,n}(X)} 3343:, the Hodge theorem gives a decomposition of the 2112:. It follows, for example, that the image of the 6174: 2139:is finite (because the group of isometries of a 359:used topological methods to reprove theorems of 155:chains induces, for any compact smooth manifold 5939: 1382:{\displaystyle \omega ,\tau \in \Omega ^{k}(M)} 66:operator of the metric. Such forms are called 5951:. Wiley Classics Library. Wiley Interscience. 5773:Chatterji, Srishti; Ojanguren, Manuel (2010), 4423:also give strong restrictions on the possible 85:. It has major applications in two settings: 3072:Hodge theory for complex projective varieties 401:is a non-zero holomorphic differential, then 4091:(shown in the case of complex dimension 2): 2871: 2833: 1964:. As a result, there is a canonical mapping 1899: 1856: 1604: 1588: 1543: 1536: 1530: 1518: 1476: 1445: 1429: 1417: 970: 5094:says that the Hodge conjecture is true for 4524:defines an element of the cohomology group 4407:{\displaystyle \partial {\bar {\partial }}} 6116:Differential Analysis on Complex Manifolds 6006: 5694:is a sheaf of mixed Hodge structures over 5580:which are built from the Hodge structure. 4795:. (Such a linear combination is called an 3090:complex projective manifold, meaning that 1793:{\displaystyle \Delta =d\delta +\delta d.} 151:, integration of differential forms along 112:. In arithmetic situations, the tools of 6135: 6110: 5809: 5546: 5479: 5354: 5283: 5257: 4983: 4953:may be much smaller than the whole group 4933: 4859: 4761: 4694: 4601: 4554: 4431:Algebraic cycles and the Hodge conjecture 3910: 3459:as a complex manifold, whereas the group 3201: 2428:{\displaystyle E_{0},E_{1},\ldots ,E_{N}} 640:. The de Rham complex is the sequence of 469: 418: 3795:and the cohomology class represented by 46:. The key observation is that, given a 6175: 6080: 6039: 5914:Griffiths & Harris (1994), p. 594. 5766: 4704:{\displaystyle H^{2p}(X,\mathbb {Z} )} 4664:predicts a converse: every element of 4611:{\displaystyle H^{2p}(X,\mathbb {C} )} 4564:{\displaystyle H^{2p}(X,\mathbb {Z} )} 2937:be the orthogonal projection, and let 2146:A variant of the Hodge theorem is the 1673:with respect to these inner products: 5973: 5489:{\displaystyle H^{2}(X,\mathbb {Z} )} 5267:{\displaystyle H^{2}(X,\mathbb {Z} )} 4185:For example, every smooth projective 596: 5896:Huybrechts (2005), Corollary 2.6.21. 5887:Huybrechts (2005), Corollary 3.2.12. 5402:of all projective K3 surfaces has a 4419:Hodge theory and extensions such as 108:, it can be applied to questions in 5926: 3776:theorem implies that a holomorphic 2721: 2678: 1224: 1085: 1024: 860:). De Rham's theorem says that the 547:must be non-zero. It follows that 498:is positive, so the cup product of 13: 5583: 4395: 4389: 3708: 3033: 2922: 2906: 2859: 2845: 2825: 2763: 2746: 2687: 2659: 2604: 2576: 2554: 2492: 2470: 2361:Hodge theory of elliptic complexes 2318: 2312: 2238: 1986: 1980: 1887: 1866: 1834: 1828: 1766: 1718: 1690: 1555: 1361: 1281: 1015: 994: 758: 696: 660: 14: 6194: 6012:Complex Geometry: An Introduction 5367:{\displaystyle \mathbb {C} ^{20}} 5296:{\displaystyle \mathbb {Z} ^{22}} 5199:of algebraic functions, known as 5123:The Hodge structure of a variety 5949:Principles of Algebraic Geometry 4375:Hodge-Riemann bilinear relations 3955:, we conclude that must lie in 3381: 2028: 1918:The Laplacian appeared first in 1623: 1317:with respect to the volume form 898: 601:The Hodge theory references the 540:{\displaystyle {\bar {\omega }}} 329: 294: 235: 224: 189: 5908: 3873:{\displaystyle (p,q)\neq (k,k)} 3474:depends only on the underlying 3125:induces a Riemannian metric on 2799:. Define the elliptic operator 1138:) the inner product induced by 592:Hodge theory for real manifolds 54:, every cohomology class has a 31:, is a method for studying the 5899: 5890: 5881: 5872: 5863: 5854: 5838: 5803: 5525: 5519: 5483: 5469: 5332: 5326: 5261: 5247: 4987: 4973: 4937: 4923: 4904: 4898: 4876: 4863: 4849: 4833: 4740: 4734: 4698: 4684: 4647: 4641: 4605: 4591: 4558: 4544: 4398: 4002:{\displaystyle H^{n-k,n-k}(X)} 3996: 3990: 3942: 3936: 3914: 3900: 3867: 3855: 3849: 3837: 3756:) is the space of holomorphic 3717: 3698: 3682: 3676: 3615: 3609: 3568: 3565: 3559: 3527: 3521: 3435: 3429: 3385: 3371: 3051: 3038: 3025: 3012: 2917: 2757: 2703: 2690: 2623: 2620: 2607: 2601: 2595: 2592: 2579: 2573: 2570: 2557: 2551: 2514: 2495: 2489: 2486: 2473: 2334: 2328: 2253: 2247: 2104:on the integral cohomology of 2032: 2018: 2005: 2002: 1996: 1881: 1875: 1850: 1844: 1733: 1727: 1714: 1711: 1705: 1646: 1640: 1619: 1600: 1594: 1472: 1466: 1457: 1451: 1414: 1411: 1399: 1376: 1370: 1302:{\displaystyle \Omega ^{k}(M)} 1296: 1290: 1260: 1257: 1251: 1233: 1170: 1164: 1121: 1118: 1112: 1094: 1049: 1043: 1009: 1003: 902: 888: 773: 767: 711: 705: 675: 669: 656: 587:, vol. 22, 1976, pp. 169–192. 531: 482: 431: 333: 319: 298: 284: 231: 228: 214: 193: 179: 77:, and it built on the work of 44:partial differential equations 1: 5920: 5878:Wells (2008), Theorem IV.5.2. 5739:Local invariant cycle theorem 4427:of compact Kähler manifolds. 3880:, then we get zero. Because 3646:group, which depends only on 613:. For a non-negative integer 5930:Computing Some Hodge Numbers 5860:Warner (1983), Theorem 6.11. 5776:A glimpse of the de Rham era 5623:variation of Hodge structure 5553:{\displaystyle \mathbb {Z} } 4768:{\displaystyle \mathbb {Z} } 4367:Lefschetz hyperplane theorem 3323:. On a Kähler manifold, the 3284: 3255: 2949:then asserts the following: 1176:{\displaystyle T_{p}^{*}(M)} 385:is necessarily zero because 355:Separately, a 1927 paper of 16:Mathematical manifold theory 7: 5869:Warner (1983), Theorem 6.8. 5717: 5010:, even if the Hodge number 4235:For another example, every 1807:. By definition, a form on 975:Choose a Riemannian metric 10: 6201: 6049:Cambridge University Press 5983:Cambridge University Press 5531:{\displaystyle H^{1,1}(X)} 5338:{\displaystyle H^{1,1}(X)} 4746:{\displaystyle H^{p,p}(X)} 4653:{\displaystyle H^{p,p}(X)} 4434: 3119:standard Riemannian metric 3075: 1815:if its Laplacian is zero: 1142:from each cotangent fiber 122: 6128:10.1007/978-0-387-73892-5 3791:of the homology class of 3644:coherent sheaf cohomology 2357:for the de Rham complex. 2100:determines a real-valued 2085:and others in the 1940s. 1341:. Explicitly, given some 971:Operators in Hodge theory 363:. In modern language, if 6057:10.1017/CBO9780511615344 5760: 4421:non-abelian Hodge theory 3819:, the homology class of 3100:complex projective space 2443:with a volume form  2062:{\displaystyle \varphi } 1938:on spacetime, viewed as 62:that vanishes under the 56:canonical representative 6081:Warner, Frank (1983) , 5734:Helmholtz decomposition 5092:Lefschetz (1,1)-theorem 5036:{\displaystyle h^{p,p}} 3808:{\displaystyle \alpha } 3784:is in fact algebraic.) 3140:For a complex manifold 2355:Helmholtz decomposition 1953:Riemannian manifold is 1756:on forms is defined by 1330:{\displaystyle \sigma } 511:{\displaystyle \omega } 5708: 5688: 5660: 5640: 5578:intermediate Jacobians 5554: 5532: 5490: 5446: 5420: 5392: 5368: 5339: 5297: 5268: 5224: 5205:transcendental numbers 5181: 5157: 5137: 5114: 5081: 5057: 5037: 5004: 4944: 4813: 4789: 4769: 4747: 4705: 4654: 4612: 4565: 4518: 4495: 4475: 4455: 4408: 4371:hard Lefschetz theorem 4003: 3949: 3874: 3809: 3727: 3625: 3445: 3293: 3111:homogeneous polynomial 3058: 2931: 2881: 2782: 2633: 2532:differential operators 2521: 2429: 2344: 2198: 2063: 2039: 1909: 1794: 1743: 1656: 1565: 1495: 1383: 1331: 1303: 1267: 1207: 1206:{\displaystyle k^{th}} 1177: 1128: 1064: 961: 803: 642:differential operators 589: 541: 512: 492: 441: 343: 246: 6112:Wells Jr., Raymond O. 5749:Hodge-Arakelov theory 5709: 5689: 5661: 5641: 5605:intersection homology 5597:mixed Hodge structure 5555: 5533: 5491: 5447: 5421: 5393: 5369: 5340: 5298: 5269: 5225: 5182: 5158: 5138: 5115: 5082: 5058: 5038: 5005: 4945: 4814: 4790: 4770: 4748: 4706: 4655: 4613: 4566: 4519: 4496: 4476: 4456: 4409: 4004: 3950: 3875: 3810: 3728: 3626: 3446: 3321:holomorphic functions 3306:a C function and the 3294: 3144:and a natural number 3059: 2932: 2882: 2783: 2634: 2522: 2430: 2345: 2199: 2064: 2040: 1910: 1795: 1744: 1657: 1566: 1496: 1384: 1332: 1304: 1268: 1208: 1178: 1129: 1073:The metric yields an 1065: 962: 804: 573: 542: 513: 493: 442: 344: 247: 159:, a bilinear pairing 5698: 5678: 5650: 5630: 5542: 5500: 5456: 5445:{\displaystyle 20-a} 5430: 5410: 5382: 5349: 5307: 5278: 5234: 5214: 5171: 5147: 5127: 5098: 5071: 5047: 5014: 4957: 4830: 4803: 4779: 4757: 4715: 4668: 4622: 4575: 4528: 4508: 4485: 4465: 4445: 4386: 3959: 3884: 3834: 3799: 3736:where Ω denotes the 3657: 3496: 3358: 3195: 3006: 2894: 2820: 2649: 2545: 2454: 2380: 2234: 2161: 2122:general linear group 2053: 1968: 1945:Every harmonic form 1920:mathematical physics 1822: 1763: 1680: 1585: 1515: 1396: 1345: 1321: 1277: 1220: 1187: 1146: 1081: 990: 875: 650: 522: 502: 456: 405: 397:. Additionally, if 266: 166: 95:projective varieties 87:Riemannian manifolds 5113:{\displaystyle p=1} 4239:has Hodge diamond 3096:complex submanifold 2327: 2148:Hodge decomposition 1995: 1924:Maxwell's equations 1843: 1250: 1163: 1111: 862:singular cohomology 821:exterior derivative 791: 755: 729: 693: 561:Hodge star operator 318: 283: 213: 6137:10338.dmlcz/141778 6008:Huybrechts, Daniel 5941:Griffiths, Phillip 5704: 5684: 5656: 5636: 5589:Mixed Hodge theory 5550: 5528: 5486: 5442: 5416: 5404:countably infinite 5388: 5364: 5335: 5293: 5264: 5220: 5197:definite integrals 5193:algebraic function 5177: 5153: 5133: 5110: 5077: 5053: 5033: 5000: 4940: 4809: 4785: 4765: 4743: 4701: 4650: 4608: 4561: 4514: 4491: 4471: 4451: 4425:fundamental groups 4404: 4196:has Hodge diamond 3999: 3945: 3870: 3805: 3723: 3621: 3441: 3412: 3289: 3054: 2927: 2877: 2795:be the adjoint of 2778: 2776: 2629: 2517: 2425: 2374:elliptic complexes 2340: 2309: 2219:. In terms of the 2194: 2090:finite-dimensional 2059: 2035: 1977: 1905: 1825: 1790: 1739: 1652: 1561: 1491: 1379: 1327: 1299: 1263: 1236: 1203: 1173: 1149: 1134:by extending (see 1124: 1097: 1060: 957: 831:in the sense that 799: 630:differential forms 597:De Rham cohomology 537: 508: 488: 437: 339: 304: 269: 242: 199: 139:published a note, 129:algebraic topology 117:-adic Hodge theory 83:de Rham cohomology 75:algebraic geometry 6147:978-0-387-73891-8 6066:978-0-521-71801-1 5992:978-0-521-35881-1 5812:Ann. of Math. (2) 5782:, working paper, 5707:{\displaystyle X} 5687:{\displaystyle X} 5659:{\displaystyle X} 5639:{\displaystyle X} 5618:Phillip Griffiths 5538:is isomorphic to 5419:{\displaystyle a} 5391:{\displaystyle X} 5345:is isomorphic to 5274:is isomorphic to 5223:{\displaystyle X} 5195:. In particular, 5180:{\displaystyle X} 5156:{\displaystyle X} 5136:{\displaystyle X} 5080:{\displaystyle X} 5056:{\displaystyle X} 4998: 4874: 4812:{\displaystyle X} 4788:{\displaystyle X} 4517:{\displaystyle p} 4494:{\displaystyle X} 4474:{\displaystyle Y} 4454:{\displaystyle X} 4401: 4379:Kähler identities 4313: 4312: 4233: 4232: 4183: 4182: 4058:complex conjugate 3476:topological space 3391: 3287: 3258: 2960:are well-defined. 1922:. In particular, 983:and recall that: 952: 792: 756: 730: 694: 534: 485: 467: 434: 416: 395:Riemann relations 357:Solomon Lefschetz 311: 276: 206: 145:de Rham's theorem 60:differential form 48:Riemannian metric 33:cohomology groups 6190: 6158: 6139: 6107: 6077: 6036: 6003: 5970: 5936: 5935: 5915: 5912: 5906: 5903: 5897: 5894: 5888: 5885: 5879: 5876: 5870: 5867: 5861: 5858: 5852: 5842: 5836: 5835: 5807: 5801: 5800: 5799: 5798: 5792: 5786:, archived from 5781: 5770: 5724:Potential theory 5713: 5711: 5710: 5705: 5693: 5691: 5690: 5685: 5665: 5663: 5662: 5657: 5645: 5643: 5642: 5637: 5559: 5557: 5556: 5551: 5549: 5537: 5535: 5534: 5529: 5518: 5517: 5495: 5493: 5492: 5487: 5482: 5468: 5467: 5451: 5449: 5448: 5443: 5425: 5423: 5422: 5417: 5397: 5395: 5394: 5389: 5373: 5371: 5370: 5365: 5363: 5362: 5357: 5344: 5342: 5341: 5336: 5325: 5324: 5302: 5300: 5299: 5294: 5292: 5291: 5286: 5273: 5271: 5270: 5265: 5260: 5246: 5245: 5229: 5227: 5226: 5221: 5186: 5184: 5183: 5178: 5162: 5160: 5159: 5154: 5142: 5140: 5139: 5134: 5119: 5117: 5116: 5111: 5086: 5084: 5083: 5078: 5062: 5060: 5059: 5054: 5042: 5040: 5039: 5034: 5032: 5031: 5009: 5007: 5006: 5001: 4999: 4996: 4994: 4986: 4972: 4971: 4949: 4947: 4946: 4941: 4936: 4922: 4921: 4897: 4896: 4875: 4872: 4870: 4862: 4848: 4847: 4818: 4816: 4815: 4810: 4794: 4792: 4791: 4786: 4774: 4772: 4771: 4766: 4764: 4752: 4750: 4749: 4744: 4733: 4732: 4710: 4708: 4707: 4702: 4697: 4683: 4682: 4662:Hodge conjecture 4659: 4657: 4656: 4651: 4640: 4639: 4617: 4615: 4614: 4609: 4604: 4590: 4589: 4570: 4568: 4567: 4562: 4557: 4543: 4542: 4523: 4521: 4520: 4515: 4500: 4498: 4497: 4492: 4480: 4478: 4477: 4472: 4460: 4458: 4457: 4452: 4437:Hodge conjecture 4413: 4411: 4410: 4405: 4403: 4402: 4394: 4361: 4351: 4242: 4241: 4199: 4198: 4094: 4093: 4077: 4047: 4008: 4006: 4005: 4000: 3989: 3988: 3954: 3952: 3951: 3946: 3935: 3934: 3913: 3899: 3898: 3879: 3877: 3876: 3871: 3817:Poincaré duality 3814: 3812: 3811: 3806: 3780:-form on all of 3732: 3730: 3729: 3724: 3716: 3715: 3697: 3696: 3675: 3674: 3630: 3628: 3627: 3622: 3608: 3607: 3606: 3589: 3558: 3557: 3556: 3545: 3520: 3519: 3473: 3450: 3448: 3447: 3442: 3428: 3427: 3411: 3384: 3370: 3369: 3339:Kähler manifold 3334: 3298: 3296: 3295: 3290: 3288: 3283: 3282: 3273: 3259: 3254: 3253: 3244: 3236: 3235: 3214: 3213: 3187: 3172: 3063: 3061: 3060: 3055: 3050: 3049: 3037: 3036: 3024: 3023: 2943:Green's operator 2936: 2934: 2933: 2928: 2926: 2925: 2916: 2915: 2910: 2909: 2886: 2884: 2883: 2878: 2855: 2854: 2849: 2848: 2829: 2828: 2812: 2787: 2785: 2784: 2779: 2777: 2773: 2772: 2767: 2766: 2756: 2755: 2750: 2749: 2739: 2738: 2729: 2728: 2702: 2701: 2686: 2685: 2669: 2668: 2663: 2662: 2638: 2636: 2635: 2630: 2619: 2618: 2591: 2590: 2569: 2568: 2526: 2524: 2523: 2518: 2513: 2512: 2485: 2484: 2466: 2465: 2434: 2432: 2431: 2426: 2424: 2423: 2405: 2404: 2392: 2391: 2349: 2347: 2346: 2341: 2326: 2321: 2316: 2315: 2305: 2304: 2280: 2279: 2246: 2245: 2218: 2203: 2201: 2200: 2195: 2138: 2068: 2066: 2065: 2060: 2044: 2042: 2041: 2036: 2031: 2017: 2016: 1994: 1989: 1984: 1983: 1963: 1942:of dimension 4. 1937: 1914: 1912: 1911: 1906: 1874: 1873: 1842: 1837: 1832: 1831: 1799: 1797: 1796: 1791: 1748: 1746: 1745: 1740: 1726: 1725: 1704: 1703: 1667:adjoint operator 1661: 1659: 1658: 1653: 1639: 1638: 1626: 1612: 1611: 1570: 1568: 1567: 1562: 1551: 1550: 1500: 1498: 1497: 1492: 1484: 1483: 1444: 1443: 1388: 1386: 1385: 1380: 1369: 1368: 1337:associated with 1336: 1334: 1333: 1328: 1308: 1306: 1305: 1300: 1289: 1288: 1272: 1270: 1269: 1264: 1249: 1244: 1232: 1231: 1214:exterior product 1212: 1210: 1209: 1204: 1202: 1201: 1182: 1180: 1179: 1174: 1162: 1157: 1133: 1131: 1130: 1125: 1110: 1105: 1093: 1092: 1069: 1067: 1066: 1061: 1056: 1052: 1042: 1041: 1032: 1031: 1002: 1001: 966: 964: 963: 958: 953: 951: 950: 949: 927: 926: 925: 909: 901: 887: 886: 859: 852: 808: 806: 805: 800: 790: 789: 776: 766: 765: 754: 753: 734: 728: 727: 714: 704: 703: 692: 691: 678: 668: 667: 569:Kunihiko Kodaira 546: 544: 543: 538: 536: 535: 527: 517: 515: 514: 509: 497: 495: 494: 489: 487: 486: 478: 468: 460: 446: 444: 443: 438: 436: 435: 427: 417: 409: 348: 346: 345: 340: 332: 317: 312: 309: 297: 282: 277: 274: 251: 249: 248: 243: 238: 227: 212: 207: 204: 192: 178: 177: 99:algebraic cycles 91:Kähler manifolds 6200: 6199: 6193: 6192: 6191: 6189: 6188: 6187: 6173: 6172: 6170: 6148: 6097: 6067: 6026: 5993: 5975:Hodge, W. V. D. 5959: 5933: 5927:Arapura, Donu, 5923: 5918: 5913: 5909: 5904: 5900: 5895: 5891: 5886: 5882: 5877: 5873: 5868: 5864: 5859: 5855: 5843: 5839: 5824:10.2307/1968379 5808: 5804: 5796: 5794: 5790: 5779: 5771: 5767: 5763: 5744:Arakelov theory 5720: 5699: 5696: 5695: 5679: 5676: 5675: 5651: 5648: 5647: 5631: 5628: 5627: 5620:'s notion of a 5591:, developed by 5586: 5584:Generalizations 5566:Torelli theorem 5545: 5543: 5540: 5539: 5507: 5503: 5501: 5498: 5497: 5478: 5463: 5459: 5457: 5454: 5453: 5431: 5428: 5427: 5411: 5408: 5407: 5383: 5380: 5379: 5358: 5353: 5352: 5350: 5347: 5346: 5314: 5310: 5308: 5305: 5304: 5287: 5282: 5281: 5279: 5276: 5275: 5256: 5241: 5237: 5235: 5232: 5231: 5215: 5212: 5211: 5172: 5169: 5168: 5148: 5145: 5144: 5128: 5125: 5124: 5099: 5096: 5095: 5072: 5069: 5068: 5065:Hodge structure 5048: 5045: 5044: 5021: 5017: 5015: 5012: 5011: 4995: 4990: 4982: 4964: 4960: 4958: 4955: 4954: 4932: 4914: 4910: 4886: 4882: 4871: 4866: 4858: 4840: 4836: 4831: 4828: 4827: 4804: 4801: 4800: 4797:algebraic cycle 4780: 4777: 4776: 4760: 4758: 4755: 4754: 4722: 4718: 4716: 4713: 4712: 4693: 4675: 4671: 4669: 4666: 4665: 4629: 4625: 4623: 4620: 4619: 4600: 4582: 4578: 4576: 4573: 4572: 4553: 4535: 4531: 4529: 4526: 4525: 4509: 4506: 4505: 4486: 4483: 4482: 4466: 4463: 4462: 4446: 4443: 4442: 4439: 4433: 4393: 4392: 4387: 4384: 4383: 4359: 4353: 4343: 4333: 4069: 4039: 3966: 3962: 3960: 3957: 3956: 3924: 3920: 3909: 3891: 3887: 3885: 3882: 3881: 3835: 3832: 3831: 3800: 3797: 3796: 3768:is projective, 3748:. For example, 3740:of holomorphic 3711: 3707: 3692: 3688: 3664: 3660: 3658: 3655: 3654: 3599: 3582: 3575: 3571: 3549: 3538: 3537: 3533: 3509: 3505: 3497: 3494: 3493: 3460: 3417: 3413: 3395: 3380: 3365: 3361: 3359: 3356: 3355: 3324: 3319: 3312: 3278: 3274: 3272: 3249: 3245: 3243: 3231: 3227: 3209: 3205: 3196: 3193: 3192: 3175: 3162: 3135:Kähler manifold 3080: 3078:Hodge structure 3074: 3045: 3041: 3032: 3031: 3019: 3015: 3007: 3004: 3003: 2921: 2920: 2911: 2905: 2904: 2903: 2895: 2892: 2891: 2850: 2844: 2843: 2842: 2824: 2823: 2821: 2818: 2817: 2800: 2775: 2774: 2768: 2762: 2761: 2760: 2751: 2745: 2744: 2743: 2734: 2730: 2724: 2720: 2713: 2707: 2706: 2697: 2693: 2681: 2677: 2670: 2664: 2658: 2657: 2656: 2652: 2650: 2647: 2646: 2614: 2610: 2586: 2582: 2564: 2560: 2546: 2543: 2542: 2502: 2498: 2480: 2476: 2461: 2457: 2455: 2452: 2451: 2447:. Suppose that 2419: 2415: 2400: 2396: 2387: 2383: 2381: 2378: 2377: 2363: 2322: 2317: 2311: 2310: 2294: 2290: 2269: 2265: 2241: 2237: 2235: 2232: 2231: 2227:decomposition: 2212: 2162: 2159: 2158: 2124: 2054: 2051: 2050: 2027: 2012: 2008: 1990: 1985: 1979: 1978: 1969: 1966: 1965: 1958: 1957:, meaning that 1940:Minkowski space 1931: 1869: 1865: 1838: 1833: 1827: 1826: 1823: 1820: 1819: 1764: 1761: 1760: 1721: 1717: 1693: 1689: 1681: 1678: 1677: 1634: 1630: 1622: 1607: 1603: 1586: 1583: 1582: 1546: 1542: 1516: 1513: 1512: 1479: 1475: 1439: 1435: 1397: 1394: 1393: 1364: 1360: 1346: 1343: 1342: 1322: 1319: 1318: 1284: 1280: 1278: 1275: 1274: 1245: 1240: 1227: 1223: 1221: 1218: 1217: 1194: 1190: 1188: 1185: 1184: 1158: 1153: 1147: 1144: 1143: 1106: 1101: 1088: 1084: 1082: 1079: 1078: 1037: 1033: 1027: 1023: 1022: 1018: 997: 993: 991: 988: 987: 973: 939: 935: 928: 921: 917: 910: 908: 897: 882: 878: 876: 873: 872: 854: 850: 841: 832: 829:cochain complex 817: 785: 781: 761: 757: 743: 739: 723: 719: 699: 695: 687: 683: 663: 659: 651: 648: 647: 611:smooth manifold 603:de Rham complex 599: 594: 557:Riemann surface 526: 525: 523: 520: 519: 503: 500: 499: 477: 476: 459: 457: 454: 453: 426: 425: 408: 406: 403: 402: 376: 369: 328: 313: 308: 293: 278: 273: 267: 264: 263: 257:perfect pairing 234: 223: 208: 203: 188: 173: 169: 167: 164: 163: 149:Stokes' theorem 125: 106:complex numbers 79:Georges de Rham 37:smooth manifold 17: 12: 11: 5: 6198: 6197: 6186: 6185: 6168: 6167: 6160: 6159: 6146: 6108: 6095: 6078: 6065: 6041:Voisin, Claire 6037: 6024: 6004: 5991: 5971: 5957: 5945:Harris, Joseph 5937: 5922: 5919: 5917: 5916: 5907: 5898: 5889: 5880: 5871: 5862: 5853: 5845:Michael Atiyah 5837: 5818:(1): 342–354. 5802: 5764: 5762: 5759: 5758: 5757: 5751: 5746: 5741: 5736: 5731: 5726: 5719: 5716: 5703: 5683: 5668:period mapping 5655: 5635: 5610:Morihiko Saito 5593:Pierre Deligne 5585: 5582: 5548: 5527: 5524: 5521: 5516: 5513: 5510: 5506: 5485: 5481: 5477: 5474: 5471: 5466: 5462: 5441: 5438: 5435: 5426:has dimension 5415: 5387: 5361: 5356: 5334: 5331: 5328: 5323: 5320: 5317: 5313: 5290: 5285: 5263: 5259: 5255: 5252: 5249: 5244: 5240: 5219: 5176: 5152: 5132: 5109: 5106: 5103: 5076: 5052: 5030: 5027: 5024: 5020: 4993: 4989: 4985: 4981: 4978: 4975: 4970: 4967: 4963: 4951: 4950: 4939: 4935: 4931: 4928: 4925: 4920: 4917: 4913: 4909: 4906: 4903: 4900: 4895: 4892: 4889: 4885: 4881: 4878: 4869: 4865: 4861: 4857: 4854: 4851: 4846: 4843: 4839: 4835: 4808: 4784: 4763: 4742: 4739: 4736: 4731: 4728: 4725: 4721: 4700: 4696: 4692: 4689: 4686: 4681: 4678: 4674: 4649: 4646: 4643: 4638: 4635: 4632: 4628: 4607: 4603: 4599: 4596: 4593: 4588: 4585: 4581: 4560: 4556: 4552: 4549: 4546: 4541: 4538: 4534: 4513: 4490: 4470: 4450: 4435:Main article: 4432: 4429: 4400: 4397: 4391: 4357: 4352:and hence has 4327: 4311: 4310: 4308: 4306: 4303: 4301: 4298: 4297: 4295: 4292: 4290: 4287: 4284: 4283: 4280: 4278: 4275: 4273: 4269: 4268: 4266: 4263: 4261: 4258: 4255: 4254: 4252: 4250: 4247: 4245: 4231: 4230: 4228: 4225: 4222: 4221: 4216: 4214: 4208: 4207: 4205: 4202: 4181: 4180: 4178: 4176: 4171: 4169: 4166: 4165: 4163: 4158: 4156: 4151: 4148: 4147: 4142: 4140: 4135: 4133: 4127: 4126: 4124: 4119: 4117: 4112: 4109: 4108: 4106: 4104: 4099: 4097: 4037:Hodge symmetry 3998: 3995: 3992: 3987: 3984: 3981: 3978: 3975: 3972: 3969: 3965: 3944: 3941: 3938: 3933: 3930: 3927: 3923: 3919: 3916: 3912: 3908: 3905: 3902: 3897: 3894: 3890: 3869: 3866: 3863: 3860: 3857: 3854: 3851: 3848: 3845: 3842: 3839: 3804: 3734: 3733: 3722: 3719: 3714: 3710: 3706: 3703: 3700: 3695: 3691: 3687: 3684: 3681: 3678: 3673: 3670: 3667: 3663: 3632: 3631: 3620: 3617: 3614: 3611: 3605: 3602: 3598: 3595: 3592: 3588: 3585: 3581: 3578: 3574: 3570: 3567: 3564: 3561: 3555: 3552: 3548: 3544: 3541: 3536: 3532: 3529: 3526: 3523: 3518: 3515: 3512: 3508: 3504: 3501: 3452: 3451: 3440: 3437: 3434: 3431: 3426: 3423: 3420: 3416: 3410: 3407: 3404: 3401: 3398: 3394: 3390: 3387: 3383: 3379: 3376: 3373: 3368: 3364: 3317: 3310: 3300: 3299: 3286: 3281: 3277: 3271: 3268: 3265: 3262: 3257: 3252: 3248: 3242: 3239: 3234: 3230: 3226: 3223: 3220: 3217: 3212: 3208: 3204: 3200: 3107:Chow's theorem 3076:Main article: 3073: 3070: 3066: 3065: 3053: 3048: 3044: 3040: 3035: 3030: 3027: 3022: 3018: 3014: 3011: 3000: 2980: 2961: 2924: 2919: 2914: 2908: 2902: 2899: 2888: 2887: 2876: 2873: 2870: 2867: 2864: 2861: 2858: 2853: 2847: 2841: 2838: 2835: 2832: 2827: 2789: 2788: 2771: 2765: 2759: 2754: 2748: 2742: 2737: 2733: 2727: 2723: 2719: 2716: 2714: 2712: 2709: 2708: 2705: 2700: 2696: 2692: 2689: 2684: 2680: 2676: 2673: 2671: 2667: 2661: 2655: 2654: 2640: 2639: 2628: 2625: 2622: 2617: 2613: 2609: 2606: 2603: 2600: 2597: 2594: 2589: 2585: 2581: 2578: 2575: 2572: 2567: 2563: 2559: 2556: 2553: 2550: 2528: 2527: 2516: 2511: 2508: 2505: 2501: 2497: 2494: 2491: 2488: 2483: 2479: 2475: 2472: 2469: 2464: 2460: 2437:vector bundles 2422: 2418: 2414: 2411: 2408: 2403: 2399: 2395: 2390: 2386: 2362: 2359: 2351: 2350: 2339: 2336: 2333: 2330: 2325: 2320: 2314: 2308: 2303: 2300: 2297: 2293: 2289: 2286: 2283: 2278: 2275: 2272: 2268: 2264: 2261: 2258: 2255: 2252: 2249: 2244: 2240: 2205: 2204: 2193: 2190: 2187: 2184: 2181: 2178: 2175: 2172: 2169: 2166: 2114:isometry group 2058: 2034: 2030: 2026: 2023: 2020: 2015: 2011: 2007: 2004: 2001: 1998: 1993: 1988: 1982: 1976: 1973: 1916: 1915: 1904: 1901: 1898: 1895: 1892: 1889: 1886: 1883: 1880: 1877: 1872: 1868: 1864: 1861: 1858: 1855: 1852: 1849: 1846: 1841: 1836: 1830: 1801: 1800: 1789: 1786: 1783: 1780: 1777: 1774: 1771: 1768: 1750: 1749: 1738: 1735: 1732: 1729: 1724: 1720: 1716: 1713: 1710: 1707: 1702: 1699: 1696: 1692: 1688: 1685: 1663: 1662: 1651: 1648: 1645: 1642: 1637: 1633: 1629: 1625: 1621: 1618: 1615: 1610: 1606: 1602: 1599: 1596: 1593: 1590: 1572: 1571: 1560: 1557: 1554: 1549: 1545: 1541: 1538: 1535: 1532: 1529: 1526: 1523: 1520: 1502: 1501: 1490: 1487: 1482: 1478: 1474: 1471: 1468: 1465: 1462: 1459: 1456: 1453: 1450: 1447: 1442: 1438: 1434: 1431: 1428: 1425: 1422: 1419: 1416: 1413: 1410: 1407: 1404: 1401: 1378: 1375: 1372: 1367: 1363: 1359: 1356: 1353: 1350: 1326: 1298: 1295: 1292: 1287: 1283: 1262: 1259: 1256: 1253: 1248: 1243: 1239: 1235: 1230: 1226: 1200: 1197: 1193: 1172: 1169: 1166: 1161: 1156: 1152: 1136:Gramian matrix 1123: 1120: 1117: 1114: 1109: 1104: 1100: 1096: 1091: 1087: 1077:on each fiber 1071: 1070: 1059: 1055: 1051: 1048: 1045: 1040: 1036: 1030: 1026: 1021: 1017: 1014: 1011: 1008: 1005: 1000: 996: 972: 969: 968: 967: 956: 948: 945: 942: 938: 934: 931: 924: 920: 916: 913: 907: 904: 900: 896: 893: 890: 885: 881: 853:(also written 846: 836: 815: 810: 809: 798: 795: 788: 784: 779: 775: 772: 769: 764: 760: 752: 749: 746: 742: 737: 733: 726: 722: 717: 713: 710: 707: 702: 698: 690: 686: 681: 677: 674: 671: 666: 662: 658: 655: 598: 595: 593: 590: 533: 530: 507: 484: 481: 475: 472: 466: 463: 433: 430: 424: 421: 415: 412: 374: 367: 350: 349: 338: 335: 331: 327: 324: 321: 316: 307: 303: 300: 296: 292: 289: 286: 281: 272: 253: 252: 241: 237: 233: 230: 226: 222: 219: 216: 211: 202: 198: 195: 191: 187: 184: 181: 176: 172: 124: 121: 29:W. V. D. Hodge 27:, named after 15: 9: 6: 4: 3: 2: 6196: 6195: 6184: 6181: 6180: 6178: 6171: 6165: 6162: 6161: 6157: 6153: 6149: 6143: 6138: 6133: 6129: 6125: 6121: 6117: 6113: 6109: 6106: 6102: 6098: 6096:0-387-90894-3 6092: 6088: 6084: 6079: 6076: 6072: 6068: 6062: 6058: 6054: 6050: 6046: 6042: 6038: 6035: 6031: 6027: 6025:3-540-21290-6 6021: 6017: 6013: 6009: 6005: 6002: 5998: 5994: 5988: 5984: 5980: 5976: 5972: 5968: 5964: 5960: 5958:0-471-05059-8 5954: 5950: 5946: 5942: 5938: 5932: 5931: 5925: 5924: 5911: 5902: 5893: 5884: 5875: 5866: 5857: 5850: 5846: 5841: 5833: 5829: 5825: 5821: 5817: 5813: 5806: 5793:on 2023-12-04 5789: 5785: 5778: 5777: 5769: 5765: 5755: 5752: 5750: 5747: 5745: 5742: 5740: 5737: 5735: 5732: 5730: 5729:Serre duality 5727: 5725: 5722: 5721: 5715: 5701: 5681: 5673: 5672:Hodge modules 5669: 5653: 5633: 5625: 5624: 5619: 5614: 5611: 5607: 5606: 5600: 5598: 5594: 5590: 5581: 5579: 5575: 5571: 5567: 5561: 5522: 5514: 5511: 5508: 5504: 5475: 5472: 5464: 5460: 5439: 5436: 5433: 5413: 5405: 5401: 5385: 5377: 5376:Picard number 5359: 5329: 5321: 5318: 5315: 5311: 5288: 5253: 5250: 5242: 5238: 5217: 5208: 5206: 5202: 5198: 5194: 5190: 5174: 5166: 5150: 5130: 5121: 5107: 5104: 5101: 5093: 5088: 5074: 5066: 5050: 5028: 5025: 5022: 5018: 4991: 4979: 4976: 4968: 4965: 4961: 4929: 4926: 4918: 4915: 4911: 4907: 4901: 4893: 4890: 4887: 4883: 4879: 4867: 4855: 4852: 4844: 4841: 4837: 4826: 4825: 4824: 4820: 4806: 4798: 4782: 4737: 4729: 4726: 4723: 4719: 4690: 4687: 4679: 4676: 4672: 4663: 4644: 4636: 4633: 4630: 4626: 4597: 4594: 4586: 4583: 4579: 4550: 4547: 4539: 4536: 4532: 4511: 4504: 4488: 4468: 4448: 4438: 4428: 4426: 4422: 4417: 4415: 4380: 4376: 4372: 4368: 4363: 4356: 4350: 4346: 4341: 4340:diffeomorphic 4337: 4331: 4326: 4322: 4318: 4317:Betti numbers 4309: 4307: 4304: 4302: 4300: 4299: 4296: 4293: 4291: 4288: 4286: 4285: 4281: 4279: 4276: 4274: 4271: 4270: 4267: 4264: 4262: 4259: 4257: 4256: 4253: 4251: 4248: 4246: 4244: 4243: 4240: 4238: 4229: 4226: 4224: 4223: 4220: 4217: 4215: 4213: 4210: 4209: 4206: 4203: 4201: 4200: 4197: 4195: 4192: 4188: 4179: 4177: 4175: 4172: 4170: 4168: 4167: 4164: 4162: 4159: 4157: 4155: 4152: 4150: 4149: 4146: 4143: 4141: 4139: 4136: 4134: 4132: 4129: 4128: 4125: 4123: 4120: 4118: 4116: 4113: 4111: 4110: 4107: 4105: 4103: 4100: 4098: 4096: 4095: 4092: 4090: 4089: 4088:Hodge diamond 4083: 4081: 4080:Serre duality 4076: 4072: 4067: 4063: 4059: 4055: 4051: 4046: 4042: 4038: 4034: 4030: 4026: 4022: 4018: 4015: 4010: 3993: 3985: 3982: 3979: 3976: 3973: 3970: 3967: 3963: 3939: 3931: 3928: 3925: 3921: 3917: 3906: 3903: 3895: 3892: 3888: 3864: 3861: 3858: 3852: 3846: 3843: 3840: 3828: 3826: 3822: 3818: 3802: 3794: 3790: 3785: 3783: 3779: 3775: 3771: 3767: 3763: 3759: 3755: 3751: 3747: 3743: 3739: 3720: 3712: 3704: 3701: 3693: 3689: 3685: 3679: 3671: 3668: 3665: 3661: 3653: 3652: 3651: 3649: 3645: 3641: 3637: 3618: 3612: 3603: 3600: 3596: 3593: 3590: 3586: 3583: 3579: 3576: 3572: 3562: 3553: 3550: 3546: 3542: 3539: 3534: 3530: 3524: 3516: 3513: 3510: 3506: 3502: 3499: 3492: 3491: 3490: 3488: 3483: 3481: 3477: 3471: 3467: 3463: 3458: 3438: 3432: 3424: 3421: 3418: 3414: 3408: 3405: 3402: 3399: 3396: 3392: 3388: 3377: 3374: 3366: 3362: 3354: 3353: 3352: 3350: 3346: 3342: 3338: 3332: 3328: 3322: 3316: 3309: 3305: 3279: 3275: 3269: 3266: 3263: 3260: 3250: 3246: 3240: 3237: 3232: 3228: 3224: 3221: 3218: 3215: 3210: 3206: 3202: 3198: 3191: 3190: 3189: 3186: 3182: 3178: 3173: 3170: 3166: 3158: 3154: 3151: 3147: 3143: 3138: 3136: 3132: 3128: 3124: 3120: 3116: 3113:equations on 3112: 3108: 3104: 3101: 3097: 3093: 3089: 3085: 3079: 3069: 3046: 3042: 3028: 3020: 3016: 3009: 3001: 2999: 2995: 2992: 2988: 2984: 2981: 2978: 2974: 2970: 2966: 2962: 2959: 2955: 2952: 2951: 2950: 2948: 2947:Hodge theorem 2944: 2940: 2912: 2900: 2897: 2874: 2868: 2865: 2862: 2856: 2851: 2839: 2836: 2830: 2816: 2815: 2814: 2811: 2808: 2804: 2798: 2794: 2769: 2752: 2740: 2735: 2731: 2725: 2717: 2715: 2710: 2698: 2694: 2682: 2674: 2672: 2665: 2645: 2644: 2643: 2626: 2615: 2611: 2598: 2587: 2583: 2565: 2561: 2548: 2541: 2540: 2539: 2537: 2533: 2509: 2506: 2503: 2499: 2481: 2477: 2467: 2462: 2458: 2450: 2449: 2448: 2446: 2442: 2438: 2420: 2416: 2412: 2409: 2406: 2401: 2397: 2393: 2388: 2384: 2375: 2371: 2367: 2358: 2356: 2337: 2331: 2323: 2306: 2301: 2298: 2295: 2291: 2287: 2284: 2281: 2276: 2273: 2270: 2266: 2262: 2259: 2256: 2250: 2242: 2230: 2229: 2228: 2226: 2222: 2216: 2211:is harmonic: 2210: 2191: 2188: 2185: 2182: 2179: 2176: 2173: 2170: 2167: 2164: 2157: 2156: 2155: 2153: 2149: 2144: 2142: 2136: 2132: 2128: 2123: 2119: 2115: 2111: 2107: 2103: 2102:inner product 2099: 2095: 2091: 2086: 2084: 2080: 2076: 2072: 2056: 2048: 2047:Hodge theorem 2024: 2021: 2013: 2009: 1999: 1991: 1974: 1971: 1961: 1956: 1952: 1948: 1943: 1941: 1935: 1929: 1925: 1921: 1902: 1896: 1893: 1890: 1884: 1878: 1870: 1862: 1859: 1853: 1847: 1839: 1818: 1817: 1816: 1814: 1810: 1806: 1787: 1784: 1781: 1778: 1775: 1772: 1769: 1759: 1758: 1757: 1755: 1736: 1730: 1722: 1708: 1700: 1697: 1694: 1686: 1683: 1676: 1675: 1674: 1672: 1668: 1665:Consider the 1649: 1643: 1635: 1631: 1627: 1616: 1613: 1608: 1597: 1591: 1581: 1580: 1579: 1577: 1558: 1552: 1547: 1539: 1533: 1527: 1524: 1521: 1511: 1510: 1509: 1507: 1488: 1485: 1480: 1469: 1463: 1460: 1454: 1448: 1440: 1436: 1432: 1426: 1423: 1420: 1408: 1405: 1402: 1392: 1391: 1390: 1373: 1365: 1357: 1354: 1351: 1348: 1340: 1324: 1316: 1312: 1293: 1285: 1254: 1246: 1241: 1237: 1228: 1215: 1198: 1195: 1191: 1167: 1159: 1154: 1150: 1141: 1137: 1115: 1107: 1102: 1098: 1089: 1076: 1075:inner product 1057: 1053: 1046: 1038: 1034: 1028: 1019: 1012: 1006: 998: 986: 985: 984: 982: 978: 954: 946: 943: 940: 936: 932: 929: 922: 918: 914: 911: 905: 894: 891: 883: 879: 871: 870: 869: 867: 863: 857: 849: 845: 839: 835: 830: 827:). This is a 826: 822: 818: 796: 793: 786: 782: 777: 770: 762: 750: 747: 744: 740: 735: 731: 724: 720: 715: 708: 700: 688: 684: 679: 672: 664: 653: 646: 645: 644: 643: 639: 635: 631: 627: 624: 620: 616: 612: 608: 604: 588: 586: 582: 577: 572: 570: 566: 562: 558: 552: 550: 528: 505: 479: 473: 470: 464: 461: 451: 428: 422: 419: 413: 410: 400: 396: 392: 388: 384: 383:wedge product 381:, then their 380: 373: 366: 362: 358: 353: 336: 325: 322: 314: 305: 301: 290: 287: 279: 270: 262: 261: 260: 258: 239: 220: 217: 209: 200: 196: 185: 182: 174: 170: 162: 161: 160: 158: 154: 150: 146: 142: 138: 134: 130: 127:The field of 120: 118: 116: 111: 110:number theory 107: 102: 100: 96: 92: 88: 84: 80: 76: 71: 69: 65: 61: 57: 53: 49: 45: 41: 38: 34: 30: 26: 22: 6183:Hodge theory 6169: 6115: 6082: 6044: 6011: 5978: 5948: 5929: 5910: 5901: 5892: 5883: 5874: 5865: 5856: 5848: 5840: 5815: 5811: 5805: 5795:, retrieved 5788:the original 5775: 5768: 5646:varies when 5621: 5615: 5603: 5601: 5588: 5587: 5562: 5400:moduli space 5230:, the group 5209: 5122: 5089: 5064: 4952: 4821: 4796: 4661: 4440: 4418: 4364: 4354: 4348: 4344: 4336:Hopf surface 4329: 4324: 4320: 4314: 4234: 4218: 4211: 4193: 4184: 4173: 4160: 4153: 4144: 4137: 4130: 4121: 4114: 4101: 4087: 4084: 4074: 4070: 4065: 4061: 4053: 4049: 4044: 4040: 4036: 4032: 4028: 4024: 4020: 4016: 4014:Hodge number 4013: 4011: 3829: 3824: 3820: 3792: 3786: 3781: 3777: 3765: 3761: 3757: 3753: 3749: 3745: 3741: 3735: 3647: 3639: 3635: 3633: 3484: 3479: 3469: 3465: 3461: 3456: 3453: 3348: 3340: 3330: 3326: 3314: 3307: 3303: 3301: 3184: 3180: 3176: 3168: 3164: 3156: 3152: 3145: 3141: 3139: 3130: 3126: 3122: 3114: 3102: 3094:is a closed 3091: 3083: 3081: 3067: 2997: 2993: 2990: 2986: 2982: 2976: 2972: 2968: 2964: 2957: 2953: 2946: 2938: 2889: 2809: 2806: 2802: 2796: 2792: 2790: 2641: 2529: 2444: 2440: 2364: 2352: 2220: 2214: 2208: 2206: 2151: 2147: 2145: 2143:is finite). 2134: 2130: 2126: 2117: 2105: 2097: 2087: 2074: 2070: 2049:states that 2046: 1959: 1946: 1944: 1933: 1927: 1917: 1812: 1808: 1804: 1802: 1751: 1670: 1664: 1575: 1573: 1505: 1503: 1338: 1314: 1313:-forms over 1310: 1139: 1072: 980: 976: 974: 865: 855: 847: 843: 837: 833: 824: 819:denotes the 813: 811: 637: 633: 626:vector space 618: 614: 606: 600: 584: 581:M. F. Atiyah 578: 574: 565:Hermann Weyl 553: 548: 449: 398: 386: 378: 371: 364: 354: 351: 254: 156: 140: 126: 114: 103: 72: 67: 51: 39: 25:Hodge theory 24: 18: 5754:ddbar lemma 5167:classes in 4503:codimension 4338:, which is 3789:cap product 3487:cup product 2945:for Δ. The 2530:are linear 391:cup product 137:Élie Cartan 21:mathematics 5921:References 5797:2018-10-15 5608:. Namely, 5570:Chow group 4373:, and the 4237:K3 surface 3760:-forms on 3744:-forms on 3634:The piece 3345:cohomology 2534:acting on 2225:direct sum 1930:such that 632:of degree 628:of smooth 133:cohomology 6166:on GitHub 6114:(2008) , 6043:(2007) , 5947:(1994) . 5574:cycle map 5437:− 5203:, can be 4908:⊆ 4880:∩ 4399:¯ 4396:∂ 4390:∂ 4056:) is the 4048:(because 3983:− 3971:− 3853:≠ 3803:α 3709:Ω 3686:≅ 3569:→ 3531:× 3503:: 3500:⌣ 3393:⨁ 3285:¯ 3267:∧ 3264:⋯ 3261:∧ 3256:¯ 3238:∧ 3222:∧ 3219:⋯ 3216:∧ 3161:forms of 3155:-form on 3029:≅ 2918:→ 2913:∙ 2860:Δ 2857:∣ 2852:∙ 2840:∈ 2770:∙ 2758:→ 2753:∙ 2722:⨁ 2688:Γ 2679:⨁ 2666:∙ 2624:→ 2605:Γ 2602:→ 2599:⋯ 2596:→ 2577:Γ 2574:→ 2555:Γ 2552:→ 2493:Γ 2490:→ 2471:Γ 2410:… 2319:Δ 2307:⊕ 2292:δ 2288:⁡ 2282:⊕ 2274:− 2263:⁡ 2257:≅ 2239:Ω 2207:in which 2189:γ 2183:β 2180:δ 2174:α 2165:ω 2057:φ 2006:→ 1987:Δ 1972:φ 1891:α 1888:Δ 1885:∣ 1867:Ω 1863:∈ 1860:α 1835:Δ 1782:δ 1776:δ 1767:Δ 1754:Laplacian 1752:Then the 1719:Ω 1715:→ 1691:Ω 1684:δ 1628:∈ 1620:→ 1605:‖ 1592:ω 1589:‖ 1556:∞ 1544:‖ 1540:ω 1537:‖ 1531:⟩ 1528:ω 1522:ω 1519:⟨ 1486:σ 1477:⟩ 1464:τ 1449:ω 1446:⟨ 1437:∫ 1430:⟩ 1427:τ 1421:ω 1418:⟨ 1415:↦ 1409:τ 1403:ω 1362:Ω 1358:∈ 1355:τ 1349:ω 1325:σ 1282:Ω 1247:∗ 1225:⋀ 1160:∗ 1108:∗ 1086:⋀ 1039:∗ 1025:⋀ 1016:Γ 995:Ω 944:− 933:⁡ 915:⁡ 906:≅ 759:Ω 748:− 732:⋯ 697:Ω 661:Ω 657:→ 621:) be the 532:¯ 529:ω 506:ω 483:¯ 480:ω 474:∧ 471:ω 462:− 432:¯ 429:ω 423:∧ 420:ω 411:− 302:≅ 232:→ 197:× 64:Laplacian 6177:Category 6120:Springer 6087:Springer 6016:Springer 6010:(2005), 5977:(1941), 5718:See also 5189:calculus 5165:homology 4381:and the 3604:′ 3587:′ 3554:′ 3543:′ 3148:, every 3098:of some 2791:and let 2372:defined 2079:elliptic 1813:harmonic 1389:we have 778:→ 736:→ 716:→ 680:→ 617:, let Ω( 153:singular 68:harmonic 6156:2359489 6105:0722297 6075:1967689 6034:2093043 6001:0003947 5967:0507725 5832:1968379 5201:periods 4997:torsion 4873:torsion 4068:)) and 3337:compact 2941:be the 2141:lattice 2120:in the 2110:torsion 2108:modulo 2083:Kodaira 1508:-form: 1183:to its 361:Riemann 123:History 6154:  6144:  6103:  6093:  6073:  6063:  6032:  6022:  5999:  5989:  5965:  5955:  5830:  5398:. The 5303:, and 4660:. The 4414:-lemma 4369:, the 3815:. By 3764:. (If 3163:type ( 3117:. The 3088:smooth 2366:Atiyah 2094:kernel 2045:. The 1955:closed 1951:closed 1273:. The 812:where 605:. Let 147:. By 42:using 5934:(PDF) 5828:JSTOR 5791:(PDF) 5780:(PDF) 5761:Notes 5496:with 5163:over 4191:genus 4187:curve 3770:Serre 3738:sheaf 3302:with 3174:with 3105:. By 3086:be a 2963:Id = 1949:on a 823:on Ω( 609:be a 35:of a 6142:ISBN 6091:ISBN 6061:ISBN 6020:ISBN 5987:ISBN 5953:ISBN 5784:EPFL 5090:The 4441:Let 4315:The 4078:(by 4012:The 3774:GAGA 3313:and 3082:Let 2956:and 2890:Let 2801:Δ = 2370:Bott 2368:and 1553:< 623:real 518:and 370:and 275:sing 89:and 58:, a 6132:hdl 6124:doi 6053:doi 5820:doi 5378:of 5067:of 4819:.) 4799:on 4501:of 4481:in 4360:= 1 4342:to 4319:of 4189:of 4082:). 4060:of 3772:'s 3478:of 3347:of 3121:on 2967:+ Δ 2435:be 2217:= 0 2125:GL( 2116:of 1962:= 0 1936:= 0 1811:is 1669:of 979:on 912:ker 864:of 858:= 0 851:= 0 636:on 81:on 50:on 19:In 6179:: 6152:MR 6150:, 6140:, 6130:, 6122:, 6101:MR 6099:, 6089:, 6085:, 6071:MR 6069:, 6059:, 6051:, 6047:, 6030:MR 6028:, 6018:, 6014:, 5997:MR 5995:, 5985:, 5981:, 5963:MR 5961:. 5943:; 5847:, 5826:. 5816:28 5814:. 5599:. 5434:20 5360:20 5289:22 4416:. 4362:. 4347:× 4332:+1 4277:20 4073:= 4043:= 4009:. 3827:. 3482:. 3468:, 3329:, 3183:= 3179:+ 3167:, 3137:. 3133:a 3123:CP 3115:CP 3103:CP 2998:GL 2996:= 2989:, 2987:GL 2985:= 2983:LG 2975:+ 2971:= 2805:+ 2803:LL 2445:dV 2285:im 2260:im 2137:)) 2133:, 1960:dα 1433::= 1216:: 930:im 842:∘ 840:+1 310:dR 205:dR 101:. 70:. 23:, 6134:: 6126:: 6055:: 5969:. 5834:. 5822:: 5702:X 5682:X 5654:X 5634:X 5547:Z 5526:) 5523:X 5520:( 5515:1 5512:, 5509:1 5505:H 5484:) 5480:Z 5476:, 5473:X 5470:( 5465:2 5461:H 5440:a 5414:a 5386:X 5355:C 5333:) 5330:X 5327:( 5322:1 5319:, 5316:1 5312:H 5284:Z 5262:) 5258:Z 5254:, 5251:X 5248:( 5243:2 5239:H 5218:X 5175:X 5151:X 5131:X 5108:1 5105:= 5102:p 5075:X 5051:X 5029:p 5026:, 5023:p 5019:h 4992:/ 4988:) 4984:Z 4980:, 4977:X 4974:( 4969:p 4966:2 4962:H 4938:) 4934:C 4930:, 4927:X 4924:( 4919:p 4916:2 4912:H 4905:) 4902:X 4899:( 4894:p 4891:, 4888:p 4884:H 4877:) 4868:/ 4864:) 4860:Z 4856:, 4853:X 4850:( 4845:p 4842:2 4838:H 4834:( 4807:X 4783:X 4762:Z 4741:) 4738:X 4735:( 4730:p 4727:, 4724:p 4720:H 4699:) 4695:Z 4691:, 4688:X 4685:( 4680:p 4677:2 4673:H 4648:) 4645:X 4642:( 4637:p 4634:, 4631:p 4627:H 4606:) 4602:C 4598:, 4595:X 4592:( 4587:p 4584:2 4580:H 4559:) 4555:Z 4551:, 4548:X 4545:( 4540:p 4537:2 4533:H 4512:p 4489:X 4469:Y 4449:X 4358:1 4355:b 4349:S 4345:S 4330:a 4328:2 4325:b 4321:X 4305:1 4294:0 4289:0 4282:1 4272:1 4265:0 4260:0 4249:1 4227:1 4219:g 4212:g 4204:1 4194:g 4174:h 4161:h 4154:h 4145:h 4138:h 4131:h 4122:h 4115:h 4102:h 4075:h 4071:h 4066:X 4064:( 4062:H 4054:X 4052:( 4050:H 4045:h 4041:h 4033:X 4029:X 4027:( 4025:H 4021:X 4019:( 4017:h 3997:) 3994:X 3991:( 3986:k 3980:n 3977:, 3974:k 3968:n 3964:H 3943:) 3940:X 3937:( 3932:n 3929:, 3926:n 3922:H 3918:= 3915:) 3911:C 3907:, 3904:X 3901:( 3896:n 3893:2 3889:H 3868:) 3865:k 3862:, 3859:k 3856:( 3850:) 3847:q 3844:, 3841:p 3838:( 3825:X 3821:Z 3793:Z 3782:X 3778:p 3766:X 3762:X 3758:p 3754:X 3752:( 3750:H 3746:X 3742:p 3721:, 3718:) 3713:p 3705:, 3702:X 3699:( 3694:q 3690:H 3683:) 3680:X 3677:( 3672:q 3669:, 3666:p 3662:H 3648:X 3640:X 3638:( 3636:H 3619:. 3616:) 3613:X 3610:( 3601:q 3597:+ 3594:q 3591:, 3584:p 3580:+ 3577:p 3573:H 3566:) 3563:X 3560:( 3551:q 3547:, 3540:p 3535:H 3528:) 3525:X 3522:( 3517:q 3514:, 3511:p 3507:H 3480:X 3472:) 3470:C 3466:X 3464:( 3462:H 3457:X 3439:. 3436:) 3433:X 3430:( 3425:q 3422:, 3419:p 3415:H 3409:r 3406:= 3403:q 3400:+ 3397:p 3389:= 3386:) 3382:C 3378:, 3375:X 3372:( 3367:r 3363:H 3349:X 3341:X 3333:) 3331:q 3327:p 3325:( 3318:s 3315:w 3311:s 3308:z 3304:f 3280:q 3276:w 3270:d 3251:1 3247:w 3241:d 3233:p 3229:z 3225:d 3211:1 3207:z 3203:d 3199:f 3185:r 3181:q 3177:p 3171:) 3169:q 3165:p 3157:X 3153:r 3150:C 3146:r 3142:X 3131:X 3127:X 3092:X 3084:X 3052:) 3047:j 3043:E 3039:( 3034:H 3026:) 3021:j 3017:E 3013:( 3010:H 2994:G 2991:L 2979:Δ 2977:G 2973:H 2969:G 2965:H 2958:G 2954:H 2939:G 2923:H 2907:E 2901:: 2898:H 2875:. 2872:} 2869:0 2866:= 2863:e 2846:E 2837:e 2834:{ 2831:= 2826:H 2810:L 2807:L 2797:L 2793:L 2764:E 2747:E 2741:: 2736:i 2732:L 2726:i 2718:= 2711:L 2704:) 2699:i 2695:E 2691:( 2683:i 2675:= 2660:E 2627:0 2621:) 2616:N 2612:E 2608:( 2593:) 2588:1 2584:E 2580:( 2571:) 2566:0 2562:E 2558:( 2549:0 2536:C 2515:) 2510:1 2507:+ 2504:i 2500:E 2496:( 2487:) 2482:i 2478:E 2474:( 2468:: 2463:i 2459:L 2441:M 2421:N 2417:E 2413:, 2407:, 2402:1 2398:E 2394:, 2389:0 2385:E 2338:. 2335:) 2332:M 2329:( 2324:k 2313:H 2302:1 2299:+ 2296:k 2277:1 2271:k 2267:d 2254:) 2251:M 2248:( 2243:k 2221:L 2215:γ 2213:Δ 2209:γ 2192:, 2186:+ 2177:+ 2171:d 2168:= 2152:ω 2135:Z 2131:M 2129:( 2127:H 2118:M 2106:M 2098:M 2075:L 2071:M 2033:) 2029:R 2025:, 2022:M 2019:( 2014:k 2010:H 2003:) 2000:M 1997:( 1992:k 1981:H 1975:: 1947:α 1934:F 1932:Δ 1928:F 1903:. 1900:} 1897:0 1894:= 1882:) 1879:M 1876:( 1871:k 1857:{ 1854:= 1851:) 1848:M 1845:( 1840:k 1829:H 1809:M 1805:R 1788:. 1785:d 1779:+ 1773:d 1770:= 1737:. 1734:) 1731:M 1728:( 1723:k 1712:) 1709:M 1706:( 1701:1 1698:+ 1695:k 1687:: 1671:d 1650:. 1647:) 1644:M 1641:( 1636:2 1632:L 1624:R 1617:M 1614:: 1609:p 1601:) 1598:p 1595:( 1576:M 1559:, 1548:2 1534:= 1525:, 1506:k 1489:. 1481:p 1473:) 1470:p 1467:( 1461:, 1458:) 1455:p 1452:( 1441:M 1424:, 1412:) 1406:, 1400:( 1377:) 1374:M 1371:( 1366:k 1352:, 1339:g 1315:M 1311:k 1297:) 1294:M 1291:( 1286:k 1261:) 1258:) 1255:M 1252:( 1242:p 1238:T 1234:( 1229:k 1199:h 1196:t 1192:k 1171:) 1168:M 1165:( 1155:p 1151:T 1140:g 1122:) 1119:) 1116:M 1113:( 1103:p 1099:T 1095:( 1090:k 1058:. 1054:) 1050:) 1047:M 1044:( 1035:T 1029:k 1020:( 1013:= 1010:) 1007:M 1004:( 999:k 981:M 977:g 955:. 947:1 941:k 937:d 923:k 919:d 903:) 899:R 895:, 892:M 889:( 884:k 880:H 866:M 856:d 848:k 844:d 838:k 834:d 825:M 816:k 814:d 797:, 794:0 787:n 783:d 774:) 771:M 768:( 763:n 751:1 745:n 741:d 725:1 721:d 712:) 709:M 706:( 701:1 689:0 685:d 676:) 673:M 670:( 665:0 654:0 638:M 634:k 619:M 615:k 607:M 579:— 549:ω 465:1 450:ω 414:1 399:ω 387:C 379:C 375:2 372:ω 368:1 365:ω 337:. 334:) 330:R 326:; 323:M 320:( 315:k 306:H 299:) 295:R 291:; 288:M 285:( 280:k 271:H 240:. 236:R 229:) 225:R 221:; 218:M 215:( 210:k 201:H 194:) 190:R 186:; 183:M 180:( 175:k 171:H 157:M 115:p 52:M 40:M

Index

mathematics
W. V. D. Hodge
cohomology groups
smooth manifold
partial differential equations
Riemannian metric
canonical representative
differential form
Laplacian
algebraic geometry
Georges de Rham
de Rham cohomology
Riemannian manifolds
Kähler manifolds
projective varieties
algebraic cycles
complex numbers
number theory
p-adic Hodge theory
algebraic topology
cohomology
Élie Cartan
de Rham's theorem
Stokes' theorem
singular
perfect pairing
Solomon Lefschetz
Riemann
wedge product
cup product

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