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Graded ring

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Generally, the index set of a graded ring is assumed to be the set of nonnegative integers, unless otherwise explicitly specified. This is the case in this article.
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such products exist. Similarly, the identity element can not be written as the product of two non-identity elements. That is, there is no unit
358: 4405: 5747: 4503: 3766: 5587: 1693: 2545: 6096: 6091:. Cambridge Studies in Advanced Mathematics. Vol. 8. Translated by Reid, M. (2nd ed.). Cambridge University Press. 6047: 6017: 5972: 2368: 4897: 5025: 4818: 4195:
under addition. The definitions for graded modules and algebras can also be extended this way replacing the indexing set
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is not important (in fact not used at all) in the definition of a graded ring; hence, the notion applies to
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Matsumura, H. (1989). "5 Dimension theory §S3 Graded rings, the Hilbert function and the Samuel function".
5442: 392: 5331: 5267: 3322:. The generators may be taken to be homogeneous (by replacing the generators by their homogeneous parts.) 5907: 3925: 213: 2864:
Remark: To give a graded morphism from a graded ring to another graded ring with the image lying in the
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Assuming the gradations of non-identity elements are non-zero, the number of elements of gradation
4698: 3801: 3677: 5409: 4742: 4198: 4172: 4150: 3837: 3274: 2074: 1322: 517: 5428:, the indexing family could be any graded monoid, assuming that the number of elements of degree 546: 304: 4952: 5902: 5878: 3917: 2177: 2060: 2038: 2007: 2689: 4480: 4454: 4385: 3109: 1897: 1862: 666:{\displaystyle R=\bigoplus _{n=0}^{\infty }R_{n}=R_{0}\oplus R_{1}\oplus R_{2}\oplus \cdots } 6058: 5721: 5639: 4110: 3728: 1354: 6121: 6027: 5918: 5173: 5100: 4870: 4083: 3921: 3870: 3545: 2894: 2865: 2352: 2013: 1776: 1540: 1507: 1478: 1284: 1229: 1221: 1194: 1165: 1067: 1006: 955: 792: 397: 291: 283: 255: 250: 241: 198: 140: 5982: 4894:'s, without using the additive part. That is, the set of elements of the graded monoid is 8: 5928: 5241: 5215: 4241: 3909: 3901: 3480: 3129: 3101: 2858: 2727: 2512:: a graded ring is a graded module over itself. An ideal in a graded ring is homogeneous 2503: 2499: 1948: 1662: 1317: 1278: 505: 309: 299: 150: 50: 42: 33: 5202: 3913: 3905: 3474: 3458: 3337: 2991: 2914: 2874: 1825: 1803: 1640: 1618: 1593: 1571: 1458: 1428: 1404: 1382: 1260: 1145: 1122: 1100: 1039: 984: 870: 850: 828: 767: 745: 565: 550: 384: 115: 106: 64: 6116: 6092: 6073: 6043: 6013: 5968: 5403: 3862: 3796: 3105: 2212: 2197: 4308: 2787:
is a submodule that is a graded module in own right and such that the set-theoretic
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can be considered as a graded monoid, where the gradation of a word is its length.
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is an example of an anticommutative algebra, graded with respect to the structure
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The previously defined notion of "graded ring" now becomes the same thing as an
5933: 4192: 3672: 2513: 677: 388: 269: 6110: 6077: 4687:{\displaystyle \varepsilon \colon \mathbb {Z} \to \mathbb {Z} /2\mathbb {Z} } 3318:
A graded module is said to be finitely generated if the underlying module is
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is the same as to give the structure of a graded algebra to the latter ring.
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is defined similarly (see below for the precise definition). It generalizes
5397: 4760: 4260: 4256: 3705: 329: 260: 94: 5967:. Translated by Thomas, Reuben. Cambridge University Press. p. 384. 5886: 4294:. Here the homogeneous elements are either of degree 0 (even) or 1 (odd). 4249: 2331: 2193: 372: 314: 203: 193: 167: 4442:{\displaystyle \varepsilon \colon \Gamma \to \mathbb {Z} /2\mathbb {Z} } 6001: 4245: 569: 69: 3939:
The above definitions have been generalized to rings graded using any
6012:, vol. 211 (Revised third ed.), New York: Springer-Verlag, 5836:{\displaystyle \sum _{p,q\in R \atop p\cdot q=m}s(p)\times _{K}s'(q)} 4580:{\displaystyle xy=(-1)^{\varepsilon (\deg x)\varepsilon (\deg y)}yx,} 4229: 1534: 324: 130: 87: 55: 5492: 125: 1612:. A homogeneous ideal is the direct sum of its homogeneous parts. 5843:. This sum is correctly defined (i.e., finite) because, for each 1092: 482: 4812: 3940: 3716: 3505:
is a field), it is given the trivial grading (every element of
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Sakarovitch, Jacques (2009). "Part II: The power of algebra".
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is also graded, being the direct sum of the cohomology groups
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a finitely generated graded module over it. Then the function
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of the monoid. Therefore the number of elements of gradation
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If we do not require that the ring have an identity element,
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is a morphism of graded modules. Explicitly, a graded module
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of the monoid of the gradation into the additive monoid of
3788:{\displaystyle \textstyle \bigwedge \nolimits ^{\bullet }V} 2052:
be the set of all nonzero homogeneous elements in a graded
5629:{\displaystyle s,s'\in K\langle \langle R\rangle \rangle } 5568:
denotes the semiring of power series with coefficients in
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else. Indeed, each such element is the product of at most
1763:{\displaystyle R/I=\bigoplus _{n=0}^{\infty }R_{n}/I_{n},} 2610:{\displaystyle \bigoplus _{n=0}^{\infty }I^{n}M/I^{n+1}M} 508:. A graded module that is also a graded ring is called a 489:. The direct sum decomposition is usually referred to as 5124:
is necessarily 0. Some authors request furthermore that
6059:"Intersection form for quasi-homogeneous singularities" 3653:
Examples of graded algebras are common in mathematics:
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of a morphism of graded modules are graded submodules.
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of the underlying modules that respects grading; i.e.,
847:. By definition of a direct sum, every nonzero element 5334: 5270: 4821: 3770: 2623: 2412:{\displaystyle M=\bigoplus _{i\in \mathbb {N} }M_{i},} 2273: 2113: 1224:, and the direct sum decomposition is a direct sum of 5750: 5724: 5668: 5642: 5590: 5539: 5501: 5445: 5412: 5244: 5218: 5176: 5130: 5103: 5028: 4987: 4955: 4939:{\displaystyle \bigcup _{n\in \mathbb {N} _{0}}R_{n}} 4900: 4873: 4771: 4745: 4711: 4651: 4617: 4506: 4483: 4457: 4408: 4388: 4356: 4317: 4266: 4201: 4175: 4153: 4113: 4086: 4020: 3965: 3873: 3840: 3804: 3769: 3731: 3680: 3589: 3548: 3515: 3405: 3340: 3277: 3204: 3139: 3051: 3011: 2937: 2917: 2897: 2877: 2811: 2738: 2692: 2548: 2431: 2371: 2077: 2016: 1951: 1900: 1865: 1828: 1806: 1779: 1696: 1665: 1643: 1621: 1596: 1574: 1543: 1510: 1481: 1461: 1431: 1407: 1385: 1357: 1325: 1287: 1263: 1232: 1197: 1168: 1148: 1125: 1103: 1070: 1042: 1009: 987: 958: 893: 873: 853: 831: 795: 770: 748: 689: 580: 520: 429: 400: 4860:{\textstyle \bigoplus _{n\in \mathbb {N} _{0}}R_{n}} 4303:
Some graded rings (or algebras) are endowed with an
2169:{\textstyle \bigoplus _{n=0}^{\infty }I^{n}/I^{n+1}} 5090:{\displaystyle \phi (m\cdot m')=\phi (m)+\phi (m')} 2617:is a graded module over the associated graded ring 5835: 5736: 5710: 5654: 5628: 5561:{\displaystyle K\langle \langle R\rangle \rangle } 5560: 5525: 5483: 5420: 5376: 5312: 5256: 5230: 5189: 5151: 5116: 5089: 5014: 4973: 4938: 4886: 4859: 4792: 4751: 4731: 4686: 4637: 4579: 4489: 4463: 4441: 4394: 4374: 4338: 4281: 4209: 4183: 4161: 4125: 4099: 4065: 4000: 3886: 3853: 3820: 3787: 3747: 3696: 3664:are exactly the homogeneous polynomials of degree 3631: 3561: 3534: 3437: 3381: 3299: 3260: 3185: 3112:is an example of such a morphism having degree 1. 3092: 3029: 2978: 2923: 2903: 2883: 2843: 2773: 2710: 2673:{\textstyle \bigoplus _{0}^{\infty }I^{n}/I^{n+1}} 2672: 2609: 2473: 2411: 2322: 2168: 2085: 2029: 1998: 1919: 1884: 1834: 1812: 1792: 1762: 1679: 1649: 1627: 1602: 1580: 1556: 1523: 1494: 1467: 1437: 1413: 1391: 1369: 1337: 1300: 1269: 1245: 1210: 1181: 1154: 1131: 1109: 1083: 1048: 1022: 993: 971: 944: 879: 859: 837: 808: 776: 754: 731: 665: 528: 481:. The index set is usually the set of nonnegative 471: 413: 5636:is defined pointwise, it is the function sending 4066:{\displaystyle R_{i}R_{j}\subseteq R_{i\cdot j}.} 3179: 3169: 2323:{\textstyle \bigoplus _{i=0}^{\infty }H^{i}(X;R)} 512:. A graded ring could also be viewed as a graded 6108: 4346:, the field with two elements. Specifically, a 3916:. One example is the close relationship between 1423:. (Equivalently, if it is a graded submodule of 5402:These notions allow us to extend the notion of 3580:is also a graded ring, then one requires that 3115: 2330:with the multiplicative structure given by the 3931: 3261:{\displaystyle P(M,t)=\sum \ell (M_{n})t^{n}} 1119:; in particular, the multiplicative identity 352: 5623: 5620: 5614: 5611: 5555: 5552: 5546: 5543: 5962: 5015:{\displaystyle \phi :M\to \mathbb {N} _{0}} 4732:{\displaystyle (\mathbb {Z} ,\varepsilon )} 4638:{\displaystyle (\mathbb {Z} ,\varepsilon )} 4449:is a homomorphism of additive monoids. An 3632:{\displaystyle R_{i}A_{j}\subseteq A_{i+j}} 2520:of a graded module is a homogeneous ideal. 2474:{\displaystyle R_{i}M_{j}\subseteq M_{i+j}} 945:{\displaystyle a=a_{0}+a_{1}+\cdots +a_{n}} 732:{\displaystyle R_{m}R_{n}\subseteq R_{m+n}} 472:{\displaystyle R_{i}R_{j}\subseteq R_{i+j}} 6056: 5847:, there are only a finite number of pairs 5718:, and the product is the function sending 4793:{\displaystyle \mathbb {Z} /2\mathbb {Z} } 4705:) is the same thing as an anticommutative 4339:{\displaystyle \mathbb {Z} /2\mathbb {Z} } 4001:{\displaystyle R=\bigoplus _{i\in G}R_{i}} 3956:is a ring with a direct sum decomposition 359: 345: 6084: 5414: 5002: 4914: 4835: 4786: 4773: 4716: 4680: 4667: 4659: 4622: 4435: 4422: 4332: 4319: 4269: 4203: 4177: 4155: 3186:{\displaystyle P(M,t)\in \mathbb {Z} \!]} 3162: 3093:{\displaystyle f(M_{n})\subseteq N_{n+d}} 2506:(with the field having trivial grading). 2390: 2079: 522: 6034: 2979:{\displaystyle M(\ell )_{n}=M_{n+\ell }} 2502:is an example of a graded module over a 1139:is a homogeneous element of degree zero. 5406:. Instead of the indexing family being 5392:Power series indexed by a graded monoid 4252:are graded by the corresponding monoid. 3438:{\displaystyle n\mapsto \dim _{k}M_{n}} 2774:{\displaystyle f(N_{i})\subseteq M_{i}} 485:or the set of integers, but can be any 14: 6109: 4949:Formally, a graded monoid is a monoid 4375:{\displaystyle (\Gamma ,\varepsilon )} 5484:{\displaystyle (K,+_{K},\times _{K})} 5377:{\textstyle {\frac {g^{n+1}-1}{g-1}}} 5313:{\textstyle {\frac {g^{n+1}-1}{g-1}}} 3711:. The homogeneous elements of degree 3660:. The homogeneous elements of degree 1687:is also a graded ring, decomposed as 979:is either 0 or homogeneous of degree 6000: 4298: 2799:if and only if it is a submodule of 2263:, is a graded ring whose underlying 1857:can be given a gradation by letting 1635:is a two-sided homogeneous ideal in 4307:structure. This notion requires a 4244:naturally grades the corresponding 3772: 556: 24: 5756: 5576:. Its elements are functions from 4484: 4458: 4415: 4389: 4360: 4290:-graded algebra. Examples include 3449:. The function coincides with the 3445:is called the Hilbert function of 2634: 2565: 2290: 2130: 1800:is the homogeneous part of degree 1727: 1448: 603: 549:as well; e.g., one can consider a 25: 6133: 4703:skew-commutative associative ring 3900:Graded algebras are much used in 3497:In the usual case where the ring 3468: 2844:{\displaystyle N_{i}=N\cap M_{i}} 1847: 887:can be uniquely written as a sum 5526:{\displaystyle (R,\cdot ,\phi )} 4815:is the subset of a graded ring, 4806: 4282:{\displaystyle \mathbb {Z} _{2}} 3646:to be a graded left module over 3535:{\displaystyle R\subseteq A_{0}} 3501:is not graded (in particular if 2338: 1379:, the homogeneous components of 3124:over a commutative graded ring 3037:is a morphism of modules, then 5956: 5830: 5824: 5803: 5797: 5711:{\displaystyle s(m)+_{K}s'(m)} 5705: 5699: 5678: 5672: 5520: 5502: 5478: 5446: 5152:{\displaystyle \phi (m)\neq 0} 5140: 5134: 5084: 5073: 5064: 5058: 5049: 5032: 4997: 4968: 4956: 4726: 4712: 4663: 4632: 4618: 4563: 4551: 4545: 4533: 4526: 4516: 4418: 4369: 4357: 3409: 3376: 3344: 3307:are finite.) It is called the 3294: 3281: 3245: 3232: 3220: 3208: 3180: 3176: 3170: 3166: 3155: 3143: 3068: 3055: 3030:{\displaystyle f\colon M\to N} 3021: 2948: 2941: 2931:is a graded module defined by 2755: 2742: 2702: 2516:it is a graded submodule. The 2317: 2305: 1993: 1961: 13: 1: 6010:Graduate Texts in Mathematics 5993: 5097:. Note that the gradation of 4763:of the additive structure of 4590:for all homogeneous elements 3821:{\displaystyle S^{\bullet }V} 3697:{\displaystyle T^{\bullet }V} 742:for all nonnegative integers 5949: 5432:is finite, for each integer 5421:{\displaystyle \mathbb {N} } 4981:, with a gradation function 4752:{\displaystyle \varepsilon } 4210:{\displaystyle \mathbb {N} } 4184:{\displaystyle \mathbb {N} } 4162:{\displaystyle \mathbb {N} } 3854:{\displaystyle H^{\bullet }} 3300:{\displaystyle \ell (M_{n})} 3116:Invariants of graded modules 2718:of graded modules, called a 2235:with coefficients in a ring 2176:is a graded ring called the 2086:{\displaystyle \mathbb {Z} } 1338:{\displaystyle I\subseteq R} 529:{\displaystyle \mathbb {Z} } 393:direct sum of abelian groups 7: 5965:Elements of automata theory 5908:Differential graded algebra 5896: 4601: 3926:Homogeneous coordinate ring 3642:In other words, we require 3576:In the case where the ring 3494:if it is graded as a ring. 2188:; geometrically, it is the 1061:Some basic properties are: 27:Type of algebraic structure 10: 6138: 5939:Differential graded module 5872: 5584:. The sum of two elements 5395: 4974:{\displaystyle (M,\cdot )} 3935:-graded rings and algebras 3472: 2343:The corresponding idea in 568:that is decomposed into a 6072:(2): 211–223 See p. 211. 6038:(1974). "Ch. 1–3, 3 §3". 5388:in such a graded monoid. 3828:are also graded algebras. 3451:integer-valued polynomial 2795:is a graded submodule of 1931:≠ 0. This is called the 387:such that the underlying 5944: 5201:is the cardinality of a 4699:supercommutative algebra 3128:, one can associate the 2711:{\displaystyle f:N\to M} 2010:: it is a direct sum of 547:non-associative algebras 6088:Commutative Ring Theory 6057:Steenbrink, J. (1977). 4739:-graded algebra, where 4490:{\displaystyle \Gamma } 4477:graded with respect to 4464:{\displaystyle \Gamma } 4395:{\displaystyle \Gamma } 3918:homogeneous polynomials 3509:is of degree 0). Thus, 3309:Hilbert–PoincarĂ© series 3041:is said to have degree 2039:homogeneous polynomials 1920:{\displaystyle R_{i}=0} 1885:{\displaystyle R_{0}=R} 1455:of a homogeneous ideal 6066:Compositio Mathematica 5903:Associated graded ring 5879:formal language theory 5837: 5738: 5737:{\displaystyle m\in R} 5712: 5656: 5655:{\displaystyle m\in R} 5630: 5562: 5533:a graded monoid. Then 5527: 5485: 5422: 5378: 5314: 5258: 5232: 5191: 5153: 5118: 5091: 5016: 4975: 4940: 4888: 4861: 4811:Intuitively, a graded 4794: 4753: 4733: 4688: 4639: 4581: 4491: 4465: 4443: 4396: 4376: 4340: 4283: 4259:is another term for a 4211: 4185: 4163: 4127: 4126:{\displaystyle i\in G} 4101: 4067: 4002: 3888: 3855: 3822: 3789: 3749: 3748:{\displaystyle T^{n}V} 3698: 3633: 3563: 3542:and the graded pieces 3536: 3439: 3383: 3301: 3262: 3187: 3120:Given a graded module 3094: 3031: 3005:be graded modules. If 2988:Serre's twisting sheaf 2980: 2925: 2905: 2885: 2871:Given a graded module 2845: 2775: 2712: 2674: 2638: 2611: 2569: 2530:in a commutative ring 2475: 2413: 2324: 2294: 2178:associated graded ring 2170: 2134: 2087: 2031: 2000: 1921: 1886: 1853:Any (non-graded) ring 1836: 1814: 1794: 1764: 1731: 1681: 1651: 1629: 1604: 1582: 1558: 1525: 1496: 1469: 1439: 1415: 1393: 1371: 1370:{\displaystyle a\in I} 1339: 1302: 1271: 1247: 1212: 1183: 1156: 1133: 1111: 1085: 1050: 1032:homogeneous components 1024: 995: 973: 946: 881: 861: 839: 810: 778: 756: 733: 667: 607: 530: 473: 415: 5838: 5739: 5713: 5657: 5631: 5563: 5528: 5486: 5423: 5379: 5315: 5259: 5233: 5192: 5190:{\displaystyle g^{n}} 5163:is not the identity. 5154: 5119: 5117:{\displaystyle 1_{M}} 5092: 5017: 4976: 4941: 4889: 4887:{\displaystyle R_{n}} 4862: 4795: 4754: 4734: 4689: 4640: 4582: 4492: 4466: 4444: 4397: 4377: 4341: 4284: 4212: 4186: 4164: 4128: 4102: 4100:{\displaystyle R_{i}} 4068: 4003: 3889: 3887:{\displaystyle H^{n}} 3856: 3823: 3790: 3750: 3699: 3634: 3564: 3562:{\displaystyle A_{i}} 3537: 3440: 3384: 3302: 3263: 3188: 3110:differential geometry 3095: 3032: 2981: 2926: 2906: 2904:{\displaystyle \ell } 2886: 2846: 2776: 2713: 2675: 2624: 2612: 2549: 2476: 2414: 2325: 2274: 2259:with coefficients in 2171: 2114: 2088: 2032: 2030:{\displaystyle R_{i}} 2001: 1922: 1887: 1837: 1815: 1795: 1793:{\displaystyle I_{n}} 1765: 1711: 1682: 1652: 1630: 1605: 1583: 1559: 1557:{\displaystyle R_{n}} 1526: 1524:{\displaystyle R_{0}} 1497: 1495:{\displaystyle R_{n}} 1470: 1440: 1416: 1394: 1372: 1340: 1303: 1301:{\displaystyle R_{0}} 1272: 1248: 1246:{\displaystyle R_{0}} 1213: 1211:{\displaystyle R_{0}} 1184: 1182:{\displaystyle R_{n}} 1157: 1134: 1112: 1086: 1084:{\displaystyle R_{0}} 1051: 1025: 1023:{\displaystyle a_{i}} 996: 974: 972:{\displaystyle a_{i}} 947: 882: 862: 840: 811: 809:{\displaystyle R_{n}} 789:A nonzero element of 779: 757: 734: 668: 587: 531: 474: 416: 414:{\displaystyle R_{i}} 5919:Graded (mathematics) 5881:, given an alphabet 5748: 5744:to the infinite sum 5722: 5666: 5640: 5588: 5537: 5499: 5443: 5410: 5332: 5268: 5242: 5216: 5174: 5128: 5101: 5026: 4985: 4953: 4898: 4871: 4819: 4769: 4743: 4709: 4701:(sometimes called a 4694:is the quotient map. 4649: 4615: 4504: 4481: 4455: 4406: 4386: 4354: 4315: 4264: 4232:may replace monoids. 4199: 4173: 4169:-graded ring, where 4151: 4111: 4084: 4018: 3963: 3946:as an index set. A 3922:projective varieties 3871: 3838: 3802: 3767: 3729: 3678: 3587: 3546: 3513: 3403: 3338: 3275: 3202: 3137: 3049: 3009: 2935: 2915: 2895: 2875: 2809: 2736: 2690: 2621: 2546: 2429: 2369: 2271: 2111: 2075: 2014: 1949: 1898: 1863: 1826: 1804: 1777: 1694: 1663: 1641: 1619: 1594: 1572: 1541: 1508: 1479: 1459: 1449:§ Graded module 1429: 1405: 1383: 1355: 1323: 1285: 1261: 1230: 1195: 1166: 1146: 1123: 1101: 1068: 1040: 1007: 985: 956: 891: 871: 851: 829: 793: 768: 746: 687: 578: 518: 506:graded vector spaces 427: 398: 256:Group with operators 199:Complemented lattice 34:Algebraic structures 5929:Graded vector space 5439:More formally, let 5257:{\displaystyle g=1} 5231:{\displaystyle n+1} 5212:or less is at most 4867:, generated by the 4350:consists of a pair 3910:homological algebra 3902:commutative algebra 3481:associative algebra 3130:formal power series 3102:exterior derivative 2724:graded homomorphism 2500:graded vector space 2358:over a graded ring 1999:{\displaystyle R=k} 1680:{\displaystyle R/I} 564:A graded ring is a 310:Composition algebra 70:Quasigroup and loop 5915:, a generalization 5833: 5793: 5734: 5708: 5652: 5626: 5558: 5523: 5481: 5418: 5374: 5310: 5254: 5228: 5187: 5149: 5114: 5087: 5012: 4971: 4936: 4925: 4884: 4857: 4846: 4790: 4749: 4729: 4684: 4635: 4577: 4487: 4461: 4439: 4392: 4372: 4336: 4279: 4207: 4181: 4159: 4123: 4097: 4063: 3998: 3987: 3914:algebraic topology 3906:algebraic geometry 3884: 3851: 3818: 3785: 3784: 3745: 3694: 3629: 3559: 3532: 3475:Graded Lie algebra 3459:Hilbert polynomial 3435: 3379: 3320:finitely generated 3297: 3258: 3183: 3106:differential forms 3090: 3027: 2992:algebraic geometry 2976: 2921: 2901: 2881: 2841: 2771: 2708: 2670: 2607: 2471: 2409: 2395: 2320: 2166: 2083: 2027: 1996: 1917: 1882: 1832: 1810: 1790: 1760: 1677: 1647: 1625: 1600: 1578: 1554: 1521: 1492: 1465: 1435: 1411: 1389: 1367: 1335: 1298: 1267: 1243: 1208: 1179: 1152: 1129: 1107: 1081: 1046: 1020: 991: 969: 942: 877: 857: 835: 806: 774: 752: 729: 663: 551:graded Lie algebra 526: 469: 411: 6098:978-1-107-71712-1 6049:978-3-540-64243-5 6019:978-0-387-95385-4 5974:978-0-521-84425-3 5791: 5751: 5404:power series ring 5372: 5308: 4901: 4822: 4299:Anticommutativity 4292:Clifford algebras 4255:An (associative) 4191:is the monoid of 3972: 3863:cohomology theory 3797:symmetric algebra 3382:{\displaystyle k} 2924:{\displaystyle M} 2884:{\displaystyle M} 2542:, the direct sum 2526:: Given an ideal 2378: 2213:topological space 2100:is an ideal in a 1933:trivial gradation 1835:{\displaystyle I} 1813:{\displaystyle n} 1650:{\displaystyle R} 1628:{\displaystyle I} 1603:{\displaystyle I} 1581:{\displaystyle n} 1468:{\displaystyle I} 1438:{\displaystyle R} 1414:{\displaystyle I} 1392:{\displaystyle a} 1270:{\displaystyle R} 1155:{\displaystyle n} 1132:{\displaystyle 1} 1110:{\displaystyle R} 1049:{\displaystyle a} 994:{\displaystyle i} 880:{\displaystyle R} 860:{\displaystyle a} 838:{\displaystyle n} 777:{\displaystyle n} 755:{\displaystyle m} 369: 368: 16:(Redirected from 6129: 6102: 6081: 6063: 6053: 6030: 5987: 5986: 5960: 5913:Filtered algebra 5868: 5858: 5842: 5840: 5839: 5834: 5823: 5815: 5814: 5792: 5790: 5773: 5743: 5741: 5740: 5735: 5717: 5715: 5714: 5709: 5698: 5690: 5689: 5661: 5659: 5658: 5653: 5635: 5633: 5632: 5627: 5604: 5567: 5565: 5564: 5559: 5532: 5530: 5529: 5524: 5491:be an arbitrary 5490: 5488: 5487: 5482: 5477: 5476: 5464: 5463: 5427: 5425: 5424: 5419: 5417: 5383: 5381: 5380: 5375: 5373: 5371: 5360: 5353: 5352: 5336: 5319: 5317: 5316: 5311: 5309: 5307: 5296: 5289: 5288: 5272: 5263: 5261: 5260: 5255: 5237: 5235: 5234: 5229: 5196: 5194: 5193: 5188: 5186: 5185: 5158: 5156: 5155: 5150: 5123: 5121: 5120: 5115: 5113: 5112: 5096: 5094: 5093: 5088: 5083: 5048: 5021: 5019: 5018: 5013: 5011: 5010: 5005: 4980: 4978: 4977: 4972: 4945: 4943: 4942: 4937: 4935: 4934: 4924: 4923: 4922: 4917: 4893: 4891: 4890: 4885: 4883: 4882: 4866: 4864: 4863: 4858: 4856: 4855: 4845: 4844: 4843: 4838: 4801: 4799: 4797: 4796: 4791: 4789: 4781: 4776: 4758: 4756: 4755: 4750: 4738: 4736: 4735: 4730: 4719: 4693: 4691: 4690: 4685: 4683: 4675: 4670: 4662: 4644: 4642: 4641: 4636: 4625: 4609:exterior algebra 4586: 4584: 4583: 4578: 4567: 4566: 4496: 4494: 4493: 4488: 4470: 4468: 4467: 4462: 4451:anticommutative 4448: 4446: 4445: 4440: 4438: 4430: 4425: 4402:is a monoid and 4401: 4399: 4398: 4393: 4381: 4379: 4378: 4373: 4345: 4343: 4342: 4337: 4335: 4327: 4322: 4288: 4286: 4285: 4280: 4278: 4277: 4272: 4217:with any monoid 4216: 4214: 4213: 4208: 4206: 4190: 4188: 4187: 4182: 4180: 4168: 4166: 4165: 4160: 4158: 4132: 4130: 4129: 4124: 4106: 4104: 4103: 4098: 4096: 4095: 4080:that lie inside 4072: 4070: 4069: 4064: 4059: 4058: 4040: 4039: 4030: 4029: 4007: 4005: 4004: 3999: 3997: 3996: 3986: 3895: 3893: 3891: 3890: 3885: 3883: 3882: 3860: 3858: 3857: 3852: 3850: 3849: 3827: 3825: 3824: 3819: 3814: 3813: 3794: 3792: 3791: 3786: 3780: 3779: 3762:exterior algebra 3756: 3754: 3752: 3751: 3746: 3741: 3740: 3703: 3701: 3700: 3695: 3690: 3689: 3658:Polynomial rings 3638: 3636: 3635: 3630: 3628: 3627: 3609: 3608: 3599: 3598: 3568: 3566: 3565: 3560: 3558: 3557: 3541: 3539: 3538: 3533: 3531: 3530: 3444: 3442: 3441: 3436: 3434: 3433: 3421: 3420: 3390: 3388: 3386: 3385: 3380: 3375: 3374: 3356: 3355: 3306: 3304: 3303: 3298: 3293: 3292: 3267: 3265: 3264: 3259: 3257: 3256: 3244: 3243: 3194: 3192: 3190: 3189: 3184: 3165: 3099: 3097: 3096: 3091: 3089: 3088: 3067: 3066: 3036: 3034: 3033: 3028: 2985: 2983: 2982: 2977: 2975: 2974: 2956: 2955: 2930: 2928: 2927: 2922: 2910: 2908: 2907: 2902: 2890: 2888: 2887: 2882: 2852: 2850: 2848: 2847: 2842: 2840: 2839: 2821: 2820: 2785:graded submodule 2782: 2780: 2778: 2777: 2772: 2770: 2769: 2754: 2753: 2717: 2715: 2714: 2709: 2679: 2677: 2676: 2671: 2669: 2668: 2653: 2648: 2647: 2637: 2632: 2616: 2614: 2613: 2608: 2603: 2602: 2587: 2579: 2578: 2568: 2563: 2491: 2487: 2480: 2478: 2477: 2472: 2470: 2469: 2451: 2450: 2441: 2440: 2418: 2416: 2415: 2410: 2405: 2404: 2394: 2393: 2351:, namely a left 2329: 2327: 2326: 2321: 2304: 2303: 2293: 2288: 2233:cohomology group 2175: 2173: 2172: 2167: 2165: 2164: 2149: 2144: 2143: 2133: 2128: 2102:commutative ring 2092: 2090: 2089: 2084: 2082: 2067:with respect to 2036: 2034: 2033: 2028: 2026: 2025: 2005: 2003: 2002: 1997: 1992: 1991: 1973: 1972: 1926: 1924: 1923: 1918: 1910: 1909: 1893: 1891: 1889: 1888: 1883: 1875: 1874: 1843: 1841: 1839: 1838: 1833: 1819: 1817: 1816: 1811: 1799: 1797: 1796: 1791: 1789: 1788: 1769: 1767: 1766: 1761: 1756: 1755: 1746: 1741: 1740: 1730: 1725: 1704: 1686: 1684: 1683: 1678: 1673: 1658: 1656: 1654: 1653: 1648: 1634: 1632: 1631: 1626: 1611: 1609: 1607: 1606: 1601: 1587: 1585: 1584: 1579: 1566:homogeneous part 1563: 1561: 1560: 1555: 1553: 1552: 1532: 1530: 1528: 1527: 1522: 1520: 1519: 1501: 1499: 1498: 1493: 1491: 1490: 1474: 1472: 1471: 1466: 1446: 1444: 1442: 1441: 1436: 1422: 1420: 1418: 1417: 1412: 1398: 1396: 1395: 1390: 1378: 1376: 1374: 1373: 1368: 1344: 1342: 1341: 1336: 1309: 1307: 1305: 1304: 1299: 1297: 1296: 1276: 1274: 1273: 1268: 1254: 1252: 1250: 1249: 1244: 1242: 1241: 1219: 1217: 1215: 1214: 1209: 1207: 1206: 1188: 1186: 1185: 1180: 1178: 1177: 1161: 1159: 1158: 1153: 1138: 1136: 1135: 1130: 1118: 1116: 1114: 1113: 1108: 1090: 1088: 1087: 1082: 1080: 1079: 1057: 1055: 1053: 1052: 1047: 1029: 1027: 1026: 1021: 1019: 1018: 1002: 1000: 998: 997: 992: 978: 976: 975: 970: 968: 967: 951: 949: 948: 943: 941: 940: 922: 921: 909: 908: 886: 884: 883: 878: 866: 864: 863: 858: 846: 844: 842: 841: 836: 815: 813: 812: 807: 805: 804: 785: 783: 781: 780: 775: 761: 759: 758: 753: 738: 736: 735: 730: 728: 727: 709: 708: 699: 698: 672: 670: 669: 664: 656: 655: 643: 642: 630: 629: 617: 616: 606: 601: 557:First properties 537: 535: 533: 532: 527: 525: 480: 478: 476: 475: 470: 468: 467: 449: 448: 439: 438: 420: 418: 417: 412: 410: 409: 377:abstract algebra 375:, in particular 361: 354: 347: 136:Commutative ring 65:Rack and quandle 30: 29: 21: 6137: 6136: 6132: 6131: 6130: 6128: 6127: 6126: 6107: 6106: 6105: 6099: 6061: 6050: 6020: 5996: 5991: 5990: 5975: 5961: 5957: 5952: 5947: 5924:Graded category 5899: 5875: 5860: 5848: 5816: 5810: 5806: 5774: 5757: 5755: 5749: 5746: 5745: 5723: 5720: 5719: 5691: 5685: 5681: 5667: 5664: 5663: 5641: 5638: 5637: 5597: 5589: 5586: 5585: 5538: 5535: 5534: 5500: 5497: 5496: 5472: 5468: 5459: 5455: 5444: 5441: 5440: 5413: 5411: 5408: 5407: 5400: 5394: 5361: 5342: 5338: 5337: 5335: 5333: 5330: 5329: 5297: 5278: 5274: 5273: 5271: 5269: 5266: 5265: 5243: 5240: 5239: 5217: 5214: 5213: 5181: 5177: 5175: 5172: 5171: 5129: 5126: 5125: 5108: 5104: 5102: 5099: 5098: 5076: 5041: 5027: 5024: 5023: 5006: 5001: 5000: 4986: 4983: 4982: 4954: 4951: 4950: 4930: 4926: 4918: 4913: 4912: 4905: 4899: 4896: 4895: 4878: 4874: 4872: 4869: 4868: 4851: 4847: 4839: 4834: 4833: 4826: 4820: 4817: 4816: 4809: 4785: 4777: 4772: 4770: 4767: 4766: 4764: 4744: 4741: 4740: 4715: 4710: 4707: 4706: 4679: 4671: 4666: 4658: 4650: 4647: 4646: 4621: 4616: 4613: 4612: 4604: 4529: 4525: 4505: 4502: 4501: 4482: 4479: 4478: 4456: 4453: 4452: 4434: 4426: 4421: 4407: 4404: 4403: 4387: 4384: 4383: 4355: 4352: 4351: 4331: 4323: 4318: 4316: 4313: 4312: 4305:anticommutative 4301: 4273: 4268: 4267: 4265: 4262: 4261: 4202: 4200: 4197: 4196: 4193:natural numbers 4176: 4174: 4171: 4170: 4154: 4152: 4149: 4148: 4133:are said to be 4112: 4109: 4108: 4091: 4087: 4085: 4082: 4081: 4048: 4044: 4035: 4031: 4025: 4021: 4019: 4016: 4015: 3992: 3988: 3976: 3964: 3961: 3960: 3937: 3878: 3874: 3872: 3869: 3868: 3866: 3845: 3841: 3839: 3836: 3835: 3833:cohomology ring 3809: 3805: 3803: 3800: 3799: 3775: 3771: 3768: 3765: 3764: 3736: 3732: 3730: 3727: 3726: 3724: 3685: 3681: 3679: 3676: 3675: 3617: 3613: 3604: 3600: 3594: 3590: 3588: 3585: 3584: 3553: 3549: 3547: 3544: 3543: 3526: 3522: 3514: 3511: 3510: 3477: 3471: 3429: 3425: 3416: 3412: 3404: 3401: 3400: 3370: 3366: 3351: 3347: 3339: 3336: 3335: 3333: 3331:polynomial ring 3288: 3284: 3276: 3273: 3272: 3252: 3248: 3239: 3235: 3203: 3200: 3199: 3161: 3138: 3135: 3134: 3132: 3118: 3078: 3074: 3062: 3058: 3050: 3047: 3046: 3010: 3007: 3006: 2964: 2960: 2951: 2947: 2936: 2933: 2932: 2916: 2913: 2912: 2896: 2893: 2892: 2876: 2873: 2872: 2835: 2831: 2816: 2812: 2810: 2807: 2806: 2804: 2765: 2761: 2749: 2745: 2737: 2734: 2733: 2731: 2720:graded morphism 2691: 2688: 2687: 2658: 2654: 2649: 2643: 2639: 2633: 2628: 2622: 2619: 2618: 2592: 2588: 2583: 2574: 2570: 2564: 2553: 2547: 2544: 2543: 2489: 2485: 2459: 2455: 2446: 2442: 2436: 2432: 2430: 2427: 2426: 2400: 2396: 2389: 2382: 2370: 2367: 2366: 2341: 2299: 2295: 2289: 2278: 2272: 2269: 2268: 2253:cohomology ring 2190:coordinate ring 2154: 2150: 2145: 2139: 2135: 2129: 2118: 2112: 2109: 2108: 2078: 2076: 2073: 2072: 2054:integral domain 2021: 2017: 2015: 2012: 2011: 1987: 1983: 1968: 1964: 1950: 1947: 1946: 1944:polynomial ring 1905: 1901: 1899: 1896: 1895: 1870: 1866: 1864: 1861: 1860: 1858: 1850: 1827: 1824: 1823: 1821: 1805: 1802: 1801: 1784: 1780: 1778: 1775: 1774: 1751: 1747: 1742: 1736: 1732: 1726: 1715: 1700: 1695: 1692: 1691: 1669: 1664: 1661: 1660: 1642: 1639: 1638: 1636: 1620: 1617: 1616: 1595: 1592: 1591: 1589: 1573: 1570: 1569: 1548: 1544: 1542: 1539: 1538: 1515: 1511: 1509: 1506: 1505: 1503: 1486: 1482: 1480: 1477: 1476: 1460: 1457: 1456: 1430: 1427: 1426: 1424: 1406: 1403: 1402: 1400: 1399:also belong to 1384: 1381: 1380: 1356: 1353: 1352: 1350: 1349:, if for every 1324: 1321: 1320: 1292: 1288: 1286: 1283: 1282: 1280: 1262: 1259: 1258: 1237: 1233: 1231: 1228: 1227: 1225: 1202: 1198: 1196: 1193: 1192: 1190: 1189:is a two-sided 1173: 1169: 1167: 1164: 1163: 1147: 1144: 1143: 1124: 1121: 1120: 1102: 1099: 1098: 1096: 1075: 1071: 1069: 1066: 1065: 1041: 1038: 1037: 1035: 1014: 1010: 1008: 1005: 1004: 986: 983: 982: 980: 963: 959: 957: 954: 953: 936: 932: 917: 913: 904: 900: 892: 889: 888: 872: 869: 868: 852: 849: 848: 830: 827: 826: 824: 800: 796: 794: 791: 790: 769: 766: 765: 763: 747: 744: 743: 717: 713: 704: 700: 694: 690: 688: 685: 684: 678:additive groups 651: 647: 638: 634: 625: 621: 612: 608: 602: 591: 579: 576: 575: 559: 521: 519: 516: 515: 513: 457: 453: 444: 440: 434: 430: 428: 425: 424: 422: 405: 401: 399: 396: 395: 365: 336: 335: 334: 305:Non-associative 287: 276: 275: 265: 245: 234: 233: 222:Map of lattices 218: 214:Boolean algebra 209:Heyting algebra 183: 172: 171: 165: 146:Integral domain 110: 99: 98: 92: 46: 28: 23: 22: 15: 12: 11: 5: 6135: 6125: 6124: 6119: 6104: 6103: 6097: 6082: 6054: 6048: 6032: 6018: 5997: 5995: 5992: 5989: 5988: 5973: 5954: 5953: 5951: 5948: 5946: 5943: 5942: 5941: 5936: 5934:Tensor algebra 5931: 5926: 5921: 5916: 5910: 5905: 5898: 5895: 5889:of words over 5874: 5871: 5832: 5829: 5826: 5822: 5819: 5813: 5809: 5805: 5802: 5799: 5796: 5789: 5786: 5783: 5780: 5777: 5772: 5769: 5766: 5763: 5760: 5754: 5733: 5730: 5727: 5707: 5704: 5701: 5697: 5694: 5688: 5684: 5680: 5677: 5674: 5671: 5651: 5648: 5645: 5625: 5622: 5619: 5616: 5613: 5610: 5607: 5603: 5600: 5596: 5593: 5557: 5554: 5551: 5548: 5545: 5542: 5522: 5519: 5516: 5513: 5510: 5507: 5504: 5480: 5475: 5471: 5467: 5462: 5458: 5454: 5451: 5448: 5416: 5393: 5390: 5370: 5367: 5364: 5359: 5356: 5351: 5348: 5345: 5341: 5306: 5303: 5300: 5295: 5292: 5287: 5284: 5281: 5277: 5253: 5250: 5247: 5227: 5224: 5221: 5203:generating set 5184: 5180: 5148: 5145: 5142: 5139: 5136: 5133: 5111: 5107: 5086: 5082: 5079: 5075: 5072: 5069: 5066: 5063: 5060: 5057: 5054: 5051: 5047: 5044: 5040: 5037: 5034: 5031: 5009: 5004: 4999: 4996: 4993: 4990: 4970: 4967: 4964: 4961: 4958: 4933: 4929: 4921: 4916: 4911: 4908: 4904: 4881: 4877: 4854: 4850: 4842: 4837: 4832: 4829: 4825: 4808: 4805: 4804: 4803: 4788: 4784: 4780: 4775: 4748: 4728: 4725: 4722: 4718: 4714: 4695: 4682: 4678: 4674: 4669: 4665: 4661: 4657: 4654: 4634: 4631: 4628: 4624: 4620: 4603: 4600: 4588: 4587: 4576: 4573: 4570: 4565: 4562: 4559: 4556: 4553: 4550: 4547: 4544: 4541: 4538: 4535: 4532: 4528: 4524: 4521: 4518: 4515: 4512: 4509: 4486: 4460: 4437: 4433: 4429: 4424: 4420: 4417: 4414: 4411: 4391: 4371: 4368: 4365: 4362: 4359: 4334: 4330: 4326: 4321: 4300: 4297: 4296: 4295: 4276: 4271: 4253: 4234: 4233: 4205: 4179: 4157: 4122: 4119: 4116: 4094: 4090: 4074: 4073: 4062: 4057: 4054: 4051: 4047: 4043: 4038: 4034: 4028: 4024: 4009: 4008: 3995: 3991: 3985: 3982: 3979: 3975: 3971: 3968: 3936: 3930: 3898: 3897: 3881: 3877: 3848: 3844: 3829: 3817: 3812: 3808: 3783: 3778: 3774: 3758: 3744: 3739: 3735: 3693: 3688: 3684: 3673:tensor algebra 3669: 3640: 3639: 3626: 3623: 3620: 3616: 3612: 3607: 3603: 3597: 3593: 3556: 3552: 3529: 3525: 3521: 3518: 3492:graded algebra 3470: 3469:Graded algebra 3467: 3432: 3428: 3424: 3419: 3415: 3411: 3408: 3378: 3373: 3369: 3365: 3362: 3359: 3354: 3350: 3346: 3343: 3296: 3291: 3287: 3283: 3280: 3269: 3268: 3255: 3251: 3247: 3242: 3238: 3234: 3231: 3228: 3225: 3222: 3219: 3216: 3213: 3210: 3207: 3182: 3178: 3175: 3172: 3168: 3164: 3160: 3157: 3154: 3151: 3148: 3145: 3142: 3117: 3114: 3087: 3084: 3081: 3077: 3073: 3070: 3065: 3061: 3057: 3054: 3026: 3023: 3020: 3017: 3014: 2973: 2970: 2967: 2963: 2959: 2954: 2950: 2946: 2943: 2940: 2920: 2900: 2880: 2838: 2834: 2830: 2827: 2824: 2819: 2815: 2803:and satisfies 2768: 2764: 2760: 2757: 2752: 2748: 2744: 2741: 2707: 2704: 2701: 2698: 2695: 2667: 2664: 2661: 2657: 2652: 2646: 2642: 2636: 2631: 2627: 2606: 2601: 2598: 2595: 2591: 2586: 2582: 2577: 2573: 2567: 2562: 2559: 2556: 2552: 2514:if and only if 2482: 2481: 2468: 2465: 2462: 2458: 2454: 2449: 2445: 2439: 2435: 2420: 2419: 2408: 2403: 2399: 2392: 2388: 2385: 2381: 2377: 2374: 2340: 2337: 2336: 2335: 2319: 2316: 2313: 2310: 2307: 2302: 2298: 2292: 2287: 2284: 2281: 2277: 2205: 2163: 2160: 2157: 2153: 2148: 2142: 2138: 2132: 2127: 2124: 2121: 2117: 2094: 2081: 2046: 2037:consisting of 2024: 2020: 1995: 1990: 1986: 1982: 1979: 1976: 1971: 1967: 1963: 1960: 1957: 1954: 1940: 1916: 1913: 1908: 1904: 1881: 1878: 1873: 1869: 1849: 1848:Basic examples 1846: 1831: 1809: 1787: 1783: 1771: 1770: 1759: 1754: 1750: 1745: 1739: 1735: 1729: 1724: 1721: 1718: 1714: 1710: 1707: 1703: 1699: 1676: 1672: 1668: 1646: 1624: 1599: 1577: 1551: 1547: 1518: 1514: 1489: 1485: 1464: 1434: 1410: 1388: 1366: 1363: 1360: 1334: 1331: 1328: 1314: 1313: 1295: 1291: 1266: 1256: 1240: 1236: 1205: 1201: 1176: 1172: 1151: 1140: 1128: 1106: 1078: 1074: 1045: 1017: 1013: 1003:. The nonzero 990: 966: 962: 939: 935: 931: 928: 925: 920: 916: 912: 907: 903: 899: 896: 876: 856: 834: 816:is said to be 803: 799: 773: 751: 740: 739: 726: 723: 720: 716: 712: 707: 703: 697: 693: 674: 673: 662: 659: 654: 650: 646: 641: 637: 633: 628: 624: 620: 615: 611: 605: 600: 597: 594: 590: 586: 583: 558: 555: 524: 510:graded algebra 466: 463: 460: 456: 452: 447: 443: 437: 433: 408: 404: 389:additive group 367: 366: 364: 363: 356: 349: 341: 338: 337: 333: 332: 327: 322: 317: 312: 307: 302: 296: 295: 294: 288: 282: 281: 278: 277: 274: 273: 270:Linear algebra 264: 263: 258: 253: 247: 246: 240: 239: 236: 235: 232: 231: 228:Lattice theory 224: 217: 216: 211: 206: 201: 196: 191: 185: 184: 178: 177: 174: 173: 164: 163: 158: 153: 148: 143: 138: 133: 128: 123: 118: 112: 111: 105: 104: 101: 100: 91: 90: 85: 80: 74: 73: 72: 67: 62: 53: 47: 41: 40: 37: 36: 26: 9: 6: 4: 3: 2: 6134: 6123: 6120: 6118: 6115: 6114: 6112: 6100: 6094: 6090: 6089: 6083: 6079: 6075: 6071: 6067: 6060: 6055: 6051: 6045: 6041: 6037: 6033: 6029: 6025: 6021: 6015: 6011: 6007: 6003: 5999: 5998: 5984: 5980: 5976: 5970: 5966: 5959: 5955: 5940: 5937: 5935: 5932: 5930: 5927: 5925: 5922: 5920: 5917: 5914: 5911: 5909: 5906: 5904: 5901: 5900: 5894: 5892: 5888: 5884: 5880: 5870: 5867: 5863: 5856: 5852: 5846: 5827: 5820: 5817: 5811: 5807: 5800: 5794: 5787: 5784: 5781: 5778: 5775: 5770: 5767: 5764: 5761: 5758: 5752: 5731: 5728: 5725: 5702: 5695: 5692: 5686: 5682: 5675: 5669: 5649: 5646: 5643: 5617: 5608: 5605: 5601: 5598: 5594: 5591: 5583: 5579: 5575: 5571: 5549: 5540: 5517: 5514: 5511: 5508: 5505: 5494: 5473: 5469: 5465: 5460: 5456: 5452: 5449: 5437: 5435: 5431: 5405: 5399: 5389: 5387: 5368: 5365: 5362: 5357: 5354: 5349: 5346: 5343: 5339: 5327: 5323: 5304: 5301: 5298: 5293: 5290: 5285: 5282: 5279: 5275: 5251: 5248: 5245: 5225: 5222: 5219: 5211: 5207: 5204: 5200: 5182: 5178: 5169: 5164: 5162: 5146: 5143: 5137: 5131: 5109: 5105: 5080: 5077: 5070: 5067: 5061: 5055: 5052: 5045: 5042: 5038: 5035: 5029: 5007: 4994: 4991: 4988: 4965: 4962: 4959: 4947: 4931: 4927: 4919: 4909: 4906: 4902: 4879: 4875: 4852: 4848: 4840: 4830: 4827: 4823: 4814: 4807:Graded monoid 4782: 4778: 4762: 4746: 4723: 4720: 4704: 4700: 4696: 4676: 4672: 4655: 4652: 4629: 4626: 4610: 4606: 4605: 4599: 4597: 4593: 4574: 4571: 4568: 4560: 4557: 4554: 4548: 4542: 4539: 4536: 4530: 4522: 4519: 4513: 4510: 4507: 4500: 4499: 4498: 4476: 4472: 4431: 4427: 4412: 4409: 4366: 4363: 4349: 4348:signed monoid 4328: 4324: 4310: 4306: 4293: 4289: 4274: 4258: 4254: 4251: 4248:; similarly, 4247: 4243: 4239: 4238: 4237: 4231: 4227: 4226: 4225: 4222: 4220: 4194: 4145: 4143: 4140: 4136: 4120: 4117: 4114: 4092: 4088: 4079: 4060: 4055: 4052: 4049: 4045: 4041: 4036: 4032: 4026: 4022: 4014: 4013: 4012: 3993: 3989: 3983: 3980: 3977: 3973: 3969: 3966: 3959: 3958: 3957: 3955: 3952: 3950: 3945: 3942: 3934: 3929: 3927: 3923: 3919: 3915: 3911: 3907: 3903: 3879: 3875: 3864: 3846: 3842: 3834: 3830: 3815: 3810: 3806: 3798: 3781: 3776: 3763: 3759: 3742: 3737: 3733: 3722: 3718: 3714: 3710: 3707: 3691: 3686: 3682: 3674: 3670: 3667: 3663: 3659: 3656: 3655: 3654: 3651: 3649: 3645: 3624: 3621: 3618: 3614: 3610: 3605: 3601: 3595: 3591: 3583: 3582: 3581: 3579: 3574: 3572: 3554: 3550: 3527: 3523: 3519: 3516: 3508: 3504: 3500: 3495: 3493: 3489: 3485: 3482: 3476: 3466: 3464: 3460: 3456: 3452: 3448: 3430: 3426: 3422: 3417: 3413: 3406: 3398: 3395:a field, and 3394: 3371: 3367: 3363: 3360: 3357: 3352: 3348: 3341: 3332: 3328: 3323: 3321: 3316: 3314: 3310: 3289: 3285: 3278: 3253: 3249: 3240: 3236: 3229: 3226: 3223: 3217: 3214: 3211: 3205: 3198: 3197: 3196: 3173: 3158: 3152: 3149: 3146: 3140: 3131: 3127: 3123: 3113: 3111: 3107: 3103: 3085: 3082: 3079: 3075: 3071: 3063: 3059: 3052: 3044: 3040: 3024: 3018: 3015: 3012: 3004: 3000: 2995: 2993: 2989: 2971: 2968: 2965: 2961: 2957: 2952: 2944: 2938: 2918: 2898: 2878: 2869: 2867: 2862: 2860: 2856: 2836: 2832: 2828: 2825: 2822: 2817: 2813: 2802: 2798: 2794: 2790: 2786: 2766: 2762: 2758: 2750: 2746: 2739: 2729: 2725: 2721: 2705: 2699: 2696: 2693: 2686: 2681: 2665: 2662: 2659: 2655: 2650: 2644: 2640: 2629: 2625: 2604: 2599: 2596: 2593: 2589: 2584: 2580: 2575: 2571: 2560: 2557: 2554: 2550: 2541: 2537: 2533: 2529: 2525: 2521: 2519: 2515: 2511: 2507: 2505: 2501: 2497: 2493: 2466: 2463: 2460: 2456: 2452: 2447: 2443: 2437: 2433: 2425: 2424: 2423: 2406: 2401: 2397: 2386: 2383: 2379: 2375: 2372: 2365: 2364: 2363: 2361: 2357: 2354: 2350: 2349:graded module 2347:is that of a 2346: 2345:module theory 2339:Graded module 2333: 2314: 2311: 2308: 2300: 2296: 2285: 2282: 2279: 2275: 2266: 2262: 2258: 2254: 2250: 2246: 2242: 2238: 2234: 2230: 2226: 2222: 2218: 2214: 2210: 2206: 2203: 2199: 2195: 2191: 2187: 2183: 2179: 2161: 2158: 2155: 2151: 2146: 2140: 2136: 2125: 2122: 2119: 2115: 2106: 2103: 2099: 2095: 2093:-graded ring. 2070: 2066: 2062: 2058: 2055: 2051: 2047: 2044: 2040: 2022: 2018: 2009: 2006:is graded by 1988: 1984: 1980: 1977: 1974: 1969: 1965: 1958: 1955: 1952: 1945: 1941: 1938: 1934: 1930: 1914: 1911: 1906: 1902: 1879: 1876: 1871: 1867: 1856: 1852: 1851: 1845: 1829: 1807: 1785: 1781: 1757: 1752: 1748: 1743: 1737: 1733: 1722: 1719: 1716: 1712: 1708: 1705: 1701: 1697: 1690: 1689: 1688: 1674: 1670: 1666: 1644: 1622: 1613: 1597: 1575: 1567: 1549: 1545: 1536: 1516: 1512: 1487: 1483: 1462: 1454: 1450: 1432: 1408: 1386: 1364: 1361: 1358: 1348: 1332: 1329: 1326: 1319: 1311: 1293: 1289: 1264: 1257: 1238: 1234: 1223: 1203: 1199: 1174: 1170: 1149: 1141: 1126: 1104: 1094: 1076: 1072: 1064: 1063: 1062: 1059: 1043: 1033: 1015: 1011: 988: 964: 960: 937: 933: 929: 926: 923: 918: 914: 910: 905: 901: 897: 894: 874: 854: 832: 823: 819: 801: 797: 787: 771: 749: 724: 721: 718: 714: 710: 705: 701: 695: 691: 683: 682: 681: 680:, such that 679: 660: 657: 652: 648: 644: 639: 635: 631: 626: 622: 618: 613: 609: 598: 595: 592: 588: 584: 581: 574: 573: 572: 571: 567: 562: 554: 552: 548: 544: 543:associativity 539: 511: 507: 503: 502:graded module 498: 496: 492: 488: 484: 464: 461: 458: 454: 450: 445: 441: 435: 431: 406: 402: 394: 390: 386: 382: 378: 374: 362: 357: 355: 350: 348: 343: 342: 340: 339: 331: 328: 326: 323: 321: 318: 316: 313: 311: 308: 306: 303: 301: 298: 297: 293: 290: 289: 285: 280: 279: 272: 271: 267: 266: 262: 259: 257: 254: 252: 249: 248: 243: 238: 237: 230: 229: 225: 223: 220: 219: 215: 212: 210: 207: 205: 202: 200: 197: 195: 192: 190: 187: 186: 181: 176: 175: 170: 169: 162: 159: 157: 156:Division ring 154: 152: 149: 147: 144: 142: 139: 137: 134: 132: 129: 127: 124: 122: 119: 117: 114: 113: 108: 103: 102: 97: 96: 89: 86: 84: 81: 79: 78:Abelian group 76: 75: 71: 68: 66: 63: 61: 57: 54: 52: 49: 48: 44: 39: 38: 35: 32: 31: 19: 18:Graded module 6087: 6069: 6065: 6039: 6036:Bourbaki, N. 6005: 5964: 5958: 5890: 5882: 5876: 5865: 5861: 5854: 5850: 5844: 5581: 5577: 5573: 5569: 5438: 5433: 5429: 5401: 5398:Novikov ring 5325: 5324:elements of 5321: 5209: 5205: 5198: 5167: 5165: 5160: 4948: 4810: 4761:identity map 4702: 4595: 4591: 4589: 4474: 4471:-graded ring 4450: 4347: 4309:homomorphism 4302: 4257:superalgebra 4250:monoid rings 4235: 4223: 4218: 4146: 4141: 4138: 4134: 4077: 4076:Elements of 4075: 4010: 3953: 3951:-graded ring 3948: 3947: 3943: 3938: 3932: 3899: 3720: 3712: 3708: 3706:vector space 3665: 3661: 3652: 3647: 3643: 3641: 3577: 3575: 3570: 3506: 3502: 3498: 3496: 3491: 3487: 3486:over a ring 3483: 3478: 3462: 3454: 3446: 3396: 3392: 3326: 3324: 3317: 3312: 3270: 3125: 3121: 3119: 3042: 3038: 3002: 2998: 2996: 2870: 2863: 2800: 2796: 2792: 2784: 2728:homomorphism 2723: 2719: 2684: 2682: 2539: 2535: 2531: 2527: 2523: 2522: 2509: 2508: 2495: 2494: 2483: 2421: 2359: 2355: 2348: 2342: 2260: 2256: 2248: 2244: 2240: 2236: 2228: 2224: 2220: 2216: 2208: 2201: 2185: 2181: 2104: 2097: 2068: 2064: 2061:localization 2056: 2049: 2042: 1936: 1932: 1928: 1854: 1772: 1614: 1565: 1453:intersection 1346: 1315: 1279:associative 1060: 1031: 821: 817: 788: 741: 675: 563: 560: 540: 509: 501: 499: 494: 490: 380: 370: 330:Hopf algebra 319: 268: 261:Vector space 226: 166: 95:Group theory 93: 58: / 6122:Ring theory 6002:Lang, Serge 5887:free monoid 5572:indexed by 5328:, and only 5170:is at most 4497:such that: 4135:homogeneous 3457:called the 2518:annihilator 2332:cup product 2200:defined by 2194:normal cone 2059:. Then the 1564:called the 1347:homogeneous 952:where each 818:homogeneous 381:graded ring 373:mathematics 315:Lie algebra 300:Associative 204:Total order 194:Semilattice 168:Ring theory 6111:Categories 5994:References 5983:1188.68177 5859:such that 5396:See also: 5022:such that 4473:is a ring 4246:group ring 4236:Examples: 4230:semigroups 4011:such that 3573:-modules. 3473:See also: 3453:for large 3271:(assuming 2911:-twist of 2484:for every 2362:such that 2198:subvariety 2196:along the 2041:of degree 1568:of degree 570:direct sum 538:-algebra. 421:such that 6078:0010-437X 6040:Algebra I 5950:Citations 5808:× 5779:⋅ 5768:∈ 5753:∑ 5729:∈ 5647:∈ 5624:⟩ 5621:⟩ 5615:⟨ 5612:⟨ 5606:∈ 5556:⟩ 5553:⟩ 5547:⟨ 5544:⟨ 5518:ϕ 5512:⋅ 5470:× 5366:− 5355:− 5302:− 5291:− 5144:≠ 5132:ϕ 5071:ϕ 5056:ϕ 5039:⋅ 5030:ϕ 4998:→ 4989:ϕ 4966:⋅ 4910:∈ 4903:⋃ 4831:∈ 4824:⨁ 4747:ε 4724:ε 4664:→ 4656:: 4653:ε 4630:ε 4558:⁡ 4549:ε 4540:⁡ 4531:ε 4520:− 4485:Γ 4459:Γ 4419:→ 4416:Γ 4413:: 4410:ε 4390:Γ 4367:ε 4361:Γ 4224:Remarks: 4118:∈ 4107:for some 4053:⋅ 4042:⊆ 3981:∈ 3974:⨁ 3847:∙ 3811:∙ 3777:∙ 3773:⋀ 3719:of order 3687:∙ 3611:⊆ 3520:⊆ 3423:⁡ 3410:↦ 3361:… 3279:ℓ 3230:ℓ 3227:∑ 3159:∈ 3072:⊆ 3022:→ 3016:: 2972:ℓ 2945:ℓ 2899:ℓ 2829:∩ 2789:inclusion 2759:⊆ 2703:→ 2635:∞ 2626:⨁ 2566:∞ 2551:⨁ 2453:⊆ 2387:∈ 2380:⨁ 2291:∞ 2276:⨁ 2131:∞ 2116:⨁ 1978:… 1728:∞ 1713:⨁ 1535:submodule 1362:∈ 1330:⊆ 1255:-modules. 927:⋯ 711:⊆ 661:⋯ 658:⊕ 645:⊕ 632:⊕ 604:∞ 589:⨁ 491:gradation 451:⊆ 325:Bialgebra 131:Near-ring 88:Lie group 56:Semigroup 6117:Algebras 6004:(2002), 5897:See also 5821:′ 5696:′ 5602:′ 5493:semiring 5081:′ 5046:′ 4602:Examples 3795:and the 3715:are the 3325:Suppose 2857:and the 2685:morphism 2538:-module 1935:on  1310:-algebra 1142:For any 1034:of  1030:are the 483:integers 161:Lie ring 126:Semiring 6028:1878556 6006:Algebra 5873:Example 5386:divisor 4800:⁠ 4765:⁠ 4759:is the 3894:⁠ 3867:⁠ 3861:in any 3755:⁠ 3725:⁠ 3717:tensors 3389:⁠ 3334:⁠ 3193:⁠ 3133:⁠ 2851:⁠ 2805:⁠ 2781:⁠ 2732:⁠ 2726:, is a 2534:and an 2524:Example 2510:Example 2496:Example 2251:), the 2239:. Then 2192:of the 2107:, then 1892:⁠ 1859:⁠ 1842:⁠ 1822:⁠ 1659:, then 1657:⁠ 1637:⁠ 1610:⁠ 1590:⁠ 1531:⁠ 1504:⁠ 1451:.) The 1445:⁠ 1425:⁠ 1421:⁠ 1401:⁠ 1377:⁠ 1351:⁠ 1308:⁠ 1281:⁠ 1253:⁠ 1226:⁠ 1218:⁠ 1191:⁠ 1117:⁠ 1097:⁠ 1093:subring 1056:⁠ 1036:⁠ 1001:⁠ 981:⁠ 845:⁠ 825:⁠ 784:⁠ 764:⁠ 536:⁠ 514:⁠ 495:grading 479:⁠ 423:⁠ 292:Algebra 284:Algebra 189:Lattice 180:Lattice 6095:  6076:  6046:  6026:  6016:  5981:  5971:  5885:, the 5197:where 4813:monoid 4645:where 4382:where 3941:monoid 3912:, and 2891:, the 2866:center 2855:kernel 2853:. The 2353:module 2227:) the 2184:along 2008:degree 1894:, and 1773:where 1502:is an 1447:; see 1277:is an 1222:module 822:degree 487:monoid 320:Graded 251:Module 242:Module 141:Domain 60:Monoid 6062:(PDF) 5945:Notes 5264:) or 5238:(for 5159:when 4242:group 4139:grade 3924:(cf. 3704:of a 3490:is a 3329:is a 3100:. An 2986:(cf. 2859:image 2504:field 2265:group 2211:be a 2071:is a 1475:with 1318:ideal 1091:is a 391:is a 383:is a 286:-like 244:-like 182:-like 151:Field 109:-like 83:Magma 51:Group 45:-like 43:Group 6093:ISBN 6074:ISSN 6044:ISBN 6014:ISBN 5969:ISBN 5495:and 4594:and 3920:and 3904:and 3831:The 3760:The 3671:The 3569:are 3001:and 2997:Let 2783:. A 2498:: a 2488:and 2422:and 2207:Let 2048:Let 1942:The 1927:for 762:and 676:of 566:ring 541:The 385:ring 379:, a 116:Ring 107:Ring 5979:Zbl 5877:In 5662:to 5580:to 4607:An 4555:deg 4537:deg 4137:of 3928:.) 3479:An 3461:of 3414:dim 3311:of 3108:in 3104:of 3045:if 2994:). 2990:in 2722:or 2267:is 2255:of 2231:th 2180:of 2096:If 2063:of 1820:of 1615:If 1588:of 1537:of 1345:is 1316:An 1095:of 867:of 820:of 493:or 371:In 121:Rng 6113:: 6070:34 6068:. 6064:. 6042:. 6024:MR 6022:, 6008:, 5977:. 5869:. 5864:= 5862:pq 5853:, 5436:. 4946:. 4697:A 4598:. 4240:A 4221:. 4144:. 3908:, 3723:, 3650:. 3465:. 3391:, 3315:. 3195:: 2683:A 2680:. 2492:. 2247:; 2223:; 2215:, 1844:. 1162:, 1058:. 786:. 553:. 500:A 497:. 6101:. 6080:. 6052:. 6031:. 5985:. 5891:A 5883:A 5866:m 5857:) 5855:q 5851:p 5849:( 5845:m 5831:) 5828:q 5825:( 5818:s 5812:K 5804:) 5801:p 5798:( 5795:s 5788:m 5785:= 5782:q 5776:p 5771:R 5765:q 5762:, 5759:p 5732:R 5726:m 5706:) 5703:m 5700:( 5693:s 5687:K 5683:+ 5679:) 5676:m 5673:( 5670:s 5650:R 5644:m 5618:R 5609:K 5599:s 5595:, 5592:s 5582:K 5578:R 5574:R 5570:K 5550:R 5541:K 5521:) 5515:, 5509:, 5506:R 5503:( 5479:) 5474:K 5466:, 5461:K 5457:+ 5453:, 5450:K 5447:( 5434:n 5430:n 5415:N 5369:1 5363:g 5358:1 5350:1 5347:+ 5344:n 5340:g 5326:G 5322:n 5305:1 5299:g 5294:1 5286:1 5283:+ 5280:n 5276:g 5252:1 5249:= 5246:g 5226:1 5223:+ 5220:n 5210:n 5206:G 5199:g 5183:n 5179:g 5168:n 5161:m 5147:0 5141:) 5138:m 5135:( 5110:M 5106:1 5085:) 5078:m 5074:( 5068:+ 5065:) 5062:m 5059:( 5053:= 5050:) 5043:m 5036:m 5033:( 5008:0 5003:N 4995:M 4992:: 4969:) 4963:, 4960:M 4957:( 4932:n 4928:R 4920:0 4915:N 4907:n 4880:n 4876:R 4853:n 4849:R 4841:0 4836:N 4828:n 4802:. 4787:Z 4783:2 4779:/ 4774:Z 4727:) 4721:, 4717:Z 4713:( 4681:Z 4677:2 4673:/ 4668:Z 4660:Z 4633:) 4627:, 4623:Z 4619:( 4596:y 4592:x 4575:, 4572:x 4569:y 4564:) 4561:y 4552:( 4546:) 4543:x 4534:( 4527:) 4523:1 4517:( 4514:= 4511:y 4508:x 4475:A 4436:Z 4432:2 4428:/ 4423:Z 4370:) 4364:, 4358:( 4333:Z 4329:2 4325:/ 4320:Z 4275:2 4270:Z 4219:G 4204:N 4178:N 4156:N 4142:i 4121:G 4115:i 4093:i 4089:R 4078:R 4061:. 4056:j 4050:i 4046:R 4037:j 4033:R 4027:i 4023:R 3994:i 3990:R 3984:G 3978:i 3970:= 3967:R 3954:R 3949:G 3944:G 3933:G 3896:. 3880:n 3876:H 3843:H 3816:V 3807:S 3782:V 3757:. 3743:V 3738:n 3734:T 3721:n 3713:n 3709:V 3692:V 3683:T 3668:. 3666:n 3662:n 3648:R 3644:A 3625:j 3622:+ 3619:i 3615:A 3606:j 3602:A 3596:i 3592:R 3578:R 3571:R 3555:i 3551:A 3528:0 3524:A 3517:R 3507:R 3503:R 3499:R 3488:R 3484:A 3463:M 3455:n 3447:M 3431:n 3427:M 3418:k 3407:n 3397:M 3393:k 3377:] 3372:n 3368:x 3364:, 3358:, 3353:0 3349:x 3345:[ 3342:k 3327:R 3313:M 3295:) 3290:n 3286:M 3282:( 3254:n 3250:t 3246:) 3241:n 3237:M 3233:( 3224:= 3221:) 3218:t 3215:, 3212:M 3209:( 3206:P 3181:] 3177:] 3174:t 3171:[ 3167:[ 3163:Z 3156:) 3153:t 3150:, 3147:M 3144:( 3141:P 3126:R 3122:M 3086:d 3083:+ 3080:n 3076:N 3069:) 3064:n 3060:M 3056:( 3053:f 3043:d 3039:f 3025:N 3019:M 3013:f 3003:N 2999:M 2969:+ 2966:n 2962:M 2958:= 2953:n 2949:) 2942:( 2939:M 2919:M 2879:M 2837:i 2833:M 2826:N 2823:= 2818:i 2814:N 2801:M 2797:M 2793:N 2767:i 2763:M 2756:) 2751:i 2747:N 2743:( 2740:f 2706:M 2700:N 2697:: 2694:f 2666:1 2663:+ 2660:n 2656:I 2651:/ 2645:n 2641:I 2630:0 2605:M 2600:1 2597:+ 2594:n 2590:I 2585:/ 2581:M 2576:n 2572:I 2561:0 2558:= 2555:n 2540:M 2536:R 2532:R 2528:I 2490:j 2486:i 2467:j 2464:+ 2461:i 2457:M 2448:j 2444:M 2438:i 2434:R 2407:, 2402:i 2398:M 2391:N 2384:i 2376:= 2373:M 2360:R 2356:M 2334:. 2318:) 2315:R 2312:; 2309:X 2306:( 2301:i 2297:H 2286:0 2283:= 2280:i 2261:R 2257:X 2249:R 2245:X 2243:( 2241:H 2237:R 2229:i 2225:R 2221:X 2219:( 2217:H 2209:X 2204:. 2202:I 2186:I 2182:R 2162:1 2159:+ 2156:n 2152:I 2147:/ 2141:n 2137:I 2126:0 2123:= 2120:n 2105:R 2098:I 2080:Z 2069:S 2065:R 2057:R 2050:S 2045:. 2043:i 2023:i 2019:R 1994:] 1989:n 1985:t 1981:, 1975:, 1970:1 1966:t 1962:[ 1959:k 1956:= 1953:R 1939:. 1937:R 1929:i 1915:0 1912:= 1907:i 1903:R 1880:R 1877:= 1872:0 1868:R 1855:R 1830:I 1808:n 1786:n 1782:I 1758:, 1753:n 1749:I 1744:/ 1738:n 1734:R 1723:0 1720:= 1717:n 1709:= 1706:I 1702:/ 1698:R 1675:I 1671:/ 1667:R 1645:R 1623:I 1598:I 1576:n 1550:n 1546:R 1533:- 1517:0 1513:R 1488:n 1484:R 1463:I 1433:R 1409:I 1387:a 1365:I 1359:a 1333:R 1327:I 1312:. 1294:0 1290:R 1265:R 1239:0 1235:R 1220:- 1204:0 1200:R 1175:n 1171:R 1150:n 1127:1 1105:R 1077:0 1073:R 1044:a 1016:i 1012:a 989:i 965:i 961:a 938:n 934:a 930:+ 924:+ 919:1 915:a 911:+ 906:0 902:a 898:= 895:a 875:R 855:a 833:n 802:n 798:R 772:n 750:m 725:n 722:+ 719:m 715:R 706:n 702:R 696:m 692:R 653:2 649:R 640:1 636:R 627:0 623:R 619:= 614:n 610:R 599:0 596:= 593:n 585:= 582:R 523:Z 465:j 462:+ 459:i 455:R 446:j 442:R 436:i 432:R 407:i 403:R 360:e 353:t 346:v 20:)

Index

Graded module
Algebraic structures
Group
Group
Semigroup
Monoid
Rack and quandle
Quasigroup and loop
Abelian group
Magma
Lie group
Group theory
Ring
Ring
Rng
Semiring
Near-ring
Commutative ring
Domain
Integral domain
Field
Division ring
Lie ring
Ring theory
Lattice
Lattice
Semilattice
Complemented lattice
Total order
Heyting algebra

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