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Algebra over a field

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that has the property that the product of any two of its elements is again in the subspace. In other words, a subalgebra of an algebra is a non-empty subset of elements that is closed under addition, multiplication, and scalar multiplication. In symbols, we say that a subset
2173:-module allows extending this theory as a Gröbner basis theory for submodules of a free module. This extension allows, for computing a Gröbner basis of a submodule, to use, without any modification, any algorithm and any software for computing Gröbner bases of ideals. 2795: 1293:, left distributivity and right distributivity are equivalent, and, in this case, only one distributivity requires a proof. In general, for non-commutative operations left distributivity and right distributivity are not equivalent, and require separate proofs. 3090: 3356: 1638:-algebra is a linear subspace that has the property that any element of the subspace multiplied on the left by any element of the algebra produces an element of the subspace. In symbols, we say that a subset 3746: 3822: 3667: 3591: 3515: 3125:, the structure coefficients are generally written with upper and lower indices, so as to distinguish their transformation properties under coordinate transformations. Specifically, lower indices are 1757:
on its own is usually taken to mean a two-sided ideal. Of course when the algebra is commutative, then all of these notions of ideal are equivalent. Conditions (1) and (2) together are equivalent to
680: 2888:{\displaystyle {\begin{matrix}&&K&&\\&\eta _{A}\swarrow &\,&\eta _{B}\searrow &\\A&&{\begin{matrix}f\\\longrightarrow \end{matrix}}&&B\end{matrix}}} 1517: 3965: 3931: 890: 773: 1914:
of the multiplication operation, which are not required in the broad definition of an algebra. The theories corresponding to the different types of algebras are often very different.
989: 2644: 2511: 2393:. The usage of "non-associative" here is meant to convey that associativity is not assumed, but it does not mean it is prohibited – that is, it means "not necessarily associative". 2391: 1857: 4086: 820: 724: 611: 3426: 3393: 2585: 3273:
There exist two such two-dimensional algebras. Each algebra consists of linear combinations (with complex coefficients) of two basis elements, 1 (the identity element) and
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in the algebra, not to be confused with the algebra with one element. It is inherently non-unital (except in the case of only one element), associative and commutative.
3258:; however, the structure constants can't be specified arbitrarily in this case, and knowing only the structure constants does not specify the algebra up to isomorphism. 3266:
Two-dimensional, three-dimensional and four-dimensional unital associative algebras over the field of complex numbers were completely classified up to isomorphism by
4024: 2787: 2761: 1892: 3967:, and hence it has the structure of an algebra over its center, which is not a field. Note that the split-biquaternion algebra is also naturally an 8-dimensional 2996: 2143:
These unital zero algebras may be more generally useful, as they allow to translate any general property of the algebras to properties of vector spaces or
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In the above example of the complex numbers viewed as a two-dimensional algebra over the real numbers, the one-dimensional real line is a subalgebra.
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There exist five such three-dimensional algebras. Each algebra consists of linear combinations of three basis elements, 1 (the identity element),
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is an example of a nonassociative algebra over the field of real numbers since the vector cross product is nonassociative, satisfying the
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has been chosen, the products of basis elements can be set arbitrarily, and then extended in a unique way to a bilinear operator on
4177: 3674: 3134: 3126: 3753: 3598: 3522: 3446: 621: 4294: 4289:. Cambridge Studies in Advanced Mathematics. Vol. 8. Translated by Reid, M. (2nd ed.). Cambridge University Press. 4203: 1772:, in that here we require the condition (2). Of course if the algebra is unital, then condition (3) implies condition (2). 1464: 17: 1906:
Algebras over fields come in many different types. These types are specified by insisting on some further axioms, such as
4088:. On the other hand, not all rings can be given the structure of an algebra over a field (for example the integers). See 351: 4351: 4319: 4233: 3940: 3906: 3130: 495:
is the identity element with respect to matrix multiplication. It is an example of a unital associative algebra, a
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Study, E. (1890), "Über Systeme complexer Zahlen und ihre Anwendungen in der Theorie der Transformationsgruppen",
830: 734: 959: 541:, as, for such a space, the result of a product is not in the space, but rather in the field of coefficients. 4094:
for a description of an attempt to give to every ring a structure that behaves like an algebra over a field.
2596: 1813:. It is the same construction one uses to make a vector space over a bigger field, namely the tensor product 1274:. The convention adopted in this article is that multiplication of elements of an algebra is not necessarily 344: 2472: 2364: 1816: 3261: 3118:
Note however that several different sets of structure coefficients can give rise to isomorphic algebras.
2452:-algebra with unit is also frequently given in an alternative way. In this case, an algebra over a field 213: 3254:. If it isn't, then the multiplication is still completely determined by its action on a set that spans 4063: 3138: 2952: 1550: 796: 700: 587: 3400: 3367: 2437: 939: 2558: 781: 4041: 3970: 909: 2687: 2329: 422: 304: 4103: 4090: 2922: 2292: 2255: 2243: 2220:
serves as a basis of the vector space and algebra multiplication extends group multiplication.
615: 2277: 2207: 1989: 993: 453: 403: 391: 4003: 2766: 2740: 4123: 3892: 3860: 3122: 2983: 2525: 2407: 2263: 2199: 2144: 1870: 1781: 1123: 461: 255: 250: 241: 198: 140: 8: 4118: 4108: 3879: 3837: 3440:. Taking into account the definition of an identity element, it is sufficient to specify 3085:{\displaystyle \mathbf {e} _{i}\mathbf {e} _{j}=\sum _{k=1}^{n}c_{i,j,k}\mathbf {e} _{k}} 2904: 2427: 2316: 2251: 2217: 2182: 2156: 2097: 1769: 1283: 1017: 538: 418: 407: 395: 309: 299: 150: 50: 42: 33: 824: 4339: 4266: 4219: 4153: 4143: 3900: 3885: 2549: 2457: 515: 430: 115: 106: 64: 3262:
Classification of low-dimensional unital associative algebras over the complex numbers
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The fourth of these algebras is non-commutative, and the others are commutative.
2400: 2284: 2236: 1787: 1564: 488: 465: 457: 449: 227: 221: 208: 188: 179: 145: 82: 1765:. It follows from condition (3) that every left or right ideal is a subalgebra. 3204: 2677:
is a ring homomorphism that commutes with the scalar multiplication defined by
2422: 2304: 1931: 1143: 580: 269: 3351:{\displaystyle \textstyle 1\cdot 1=1\,,\quad 1\cdot a=a\,,\quad a\cdot 1=a\,.} 483:
with respect to the multiplication. The ring of real square matrices of order
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is only a commutative ring and not a field, then the same process works if
2552:. This definition is equivalent to that above, with scalar multiplication 2359: 2300: 1325: 1025: 388: 384: 329: 260: 94: 1239:
These three axioms are another way of saying that the binary operation is
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over a field. The construction of the unital zero algebra over a free
2541: 1533: 533:. Algebras are not to be confused with vector spaces equipped with a 324: 130: 87: 55: 2937:, i.e., so the resulting multiplication satisfies the algebra laws. 410:
and satisfying the axioms implied by "vector space" and "bilinear".
2412: 125: 3896: 2090:, the unital zero algebra is the quotient of the polynomial ring 2986:. These structure coefficients determine the multiplication in 59: 4060:-module structure, since one can take the unique homomorphism 456:
since matrix multiplication is associative. Three-dimensional
3741:{\displaystyle \textstyle aa=1\,,\quad bb=0\,,\quad ab=-ba=b} 2945: 413:
The multiplication operation in an algebra may or may not be
4338: 4173: 3817:{\displaystyle \textstyle aa=0\,,\quad bb=0\,,\quad ab=ba=0} 3662:{\displaystyle \textstyle aa=b\,,\quad bb=0\,,\quad ab=ba=0} 3586:{\displaystyle \textstyle aa=a\,,\quad bb=0\,,\quad ab=ba=0} 3510:{\displaystyle \textstyle aa=a\,,\quad bb=b\,,\quad ab=ba=0} 2909:
For algebras over a field, the bilinear multiplication from
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is a subset that is both a left and a right ideal. The term
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together with operations of multiplication and addition and
3899:. A classical example of an algebra over its center is the 1805:, then there is a natural way to construct an algebra over 1729:
is closed under left multiplication by arbitrary elements).
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Introduction to Commutative algebra and algebraic geometry
3840:, it is common to consider the more general concept of an 444:
is an example of an associative algebra over the field of
2140:-algebra built from a one dimensional real vector space. 2004:, and defining the product of every pair of elements of 675:{\displaystyle \left(a+ib\right)\cdot \left(c+id\right)} 530: 3855:. The only part of the definition that changes is that 2536:
is a ring homomorphism, then one must have either that
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This definition is different from the definition of an
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is said to be a unital homomorphism. The space of all
4066: 4044: 4006: 3973: 3943: 3909: 3756: 3677: 3601: 3525: 3449: 3403: 3370: 3286: 3141:. Thus, the structure coefficients are often written 2999: 2798: 2769: 2743: 2690: 2599: 2561: 2475: 2367: 1873: 1819: 1512:{\displaystyle \mathbf {Hom} _{K{\text{-alg}}}(A,B).} 1467: 962: 912: 833: 799: 737: 703: 624: 590: 4342:; Gubareni, Nadiya; Kirichenko, Vladimir V. (2004). 2132:
An example of unital zero algebra is the algebra of
4038:-algebra structure. So a ring comes with a natural 4080: 4052: 4018: 3981: 3959: 3925: 3873: 3816: 3740: 3661: 3585: 3509: 3420: 3387: 3350: 3084: 2944:, any finite-dimensional algebra can be specified 2921:is completely determined by the multiplication of 2887: 2789:. In other words, the following diagram commutes: 2781: 2755: 2726: 2638: 2579: 2505: 2385: 2291:. Here the algebra multiplication is given by the 1886: 1851: 1511: 1104:if the following identities hold for all elements 983: 929: 884: 814: 767: 718: 674: 605: 1901: 4362: 3960:{\displaystyle \mathbb {R} \times \mathbb {R} } 3926:{\displaystyle \mathbb {H} \times \mathbb {H} } 3154:, and their defining rule is written using the 2396:Examples detailed in the main article include: 2307:. If an involution is given as well, we obtain 1266:. The binary operation is often referred to as 1289:When a binary operation on a vector space is 352: 27:Vector space equipped with a bilinear product 2299:; many of them are defined on an underlying 885:{\displaystyle (a+{\vec {v}})(b+{\vec {w}})} 544: 1422:are unital, then a homomorphism satisfying 768:{\displaystyle {\vec {a}}\times {\vec {b}}} 4225:An Introduction to Nonassociative Algebras 4174:Hazewinkel, Gubareni & Kirichenko 2004 3891:is always an associative algebra over its 2323: 2295:of operators. These algebras also carry a 1678:, we have the following three statements. 359: 345: 4282: 4068: 4046: 3975: 3953: 3945: 3919: 3911: 3787: 3770: 3708: 3691: 3632: 3615: 3556: 3539: 3480: 3463: 3343: 3323: 3303: 2898: 2830: 2187:Examples of associative algebras include 1544: 965: 914: 802: 706: 593: 4196:Approximation of Vector Valued Functions 3203:If you apply this to vectors written in 1301: 984:{\displaystyle \mathbb {R} ^{n\times n}} 4218: 2639:{\displaystyle (k,a)\mapsto \eta (k)a.} 1775: 1711:is closed under scalar multiplication), 529:leads to the more general notion of an 14: 4363: 4212: 4189: 3836:In some areas of mathematics, such as 2506:{\displaystyle \eta \colon K\to Z(A),} 2386:{\displaystyle A\times A\rightarrow A} 2266:defined on some fixed open set in the 2206:. Here the multiplication is ordinary 2176: 1992:of a field (or more generally a ring) 549: 520:unital associative commutative algebra 4248: 2443: 1852:{\displaystyle V_{F}:=V\otimes _{K}F} 1278:, although some authors use the term 4309: 4000:, then any unital ring homomorphism 525:Replacing the field of scalars by a 4034:, and this is what is known as the 3832:Generalization: algebra over a ring 2202:over a field (or commutative ring) 24: 2649:Given two such associative unital 25: 4382: 4081:{\displaystyle \mathbb {Z} \to A} 2448:The definition of an associative 2406:with multiplication given by the 1917: 1797:, which is to say a bigger field 1296: 1122:, and all elements (often called 487:forms a unital algebra since the 460:with multiplication given by the 3072: 3014: 3002: 1476: 1473: 1470: 815:{\displaystyle \mathbb {R} ^{4}} 719:{\displaystyle \mathbb {R} ^{3}} 606:{\displaystyle \mathbb {R} ^{2}} 3874:Associative algebras over rings 3791: 3774: 3712: 3695: 3636: 3619: 3560: 3543: 3484: 3467: 3421:{\displaystyle \textstyle aa=0} 3388:{\displaystyle \textstyle aa=1} 3327: 3307: 2929:. Conversely, once a basis for 1957: 1446:-algebra homomorphisms between 514:, or in some subjects such as 4303: 4276: 4242: 4183: 4166: 4072: 4010: 3748:  for the fourth algebra, 3593:  for the second algebra, 3428:  for the second algebra. 2868: 2843: 2825: 2721: 2715: 2703: 2694: 2627: 2621: 2615: 2612: 2600: 2580:{\displaystyle K\times A\to A} 2571: 2497: 2491: 2485: 2377: 1902:Kinds of algebras and examples 1503: 1491: 924: 918: 879: 873: 858: 855: 849: 834: 759: 744: 13: 1: 4332: 3937:. The center of that ring is 3824:  for the fifth algebra. 3669:  for the third algebra, 3517:  for the first algebra, 3395:  for the first algebra, 2270:. These are also commutative. 2147:. For example, the theory of 1650:is a left ideal if for every 1580:is a subalgebra if for every 1007: 499:that is also a vector space. 4053:{\displaystyle \mathbb {Z} } 3982:{\displaystyle \mathbb {R} } 3933:, the direct product of two 2250:-algebra of all real-valued 1211:Compatibility with scalars: 1032:equipped with an additional 930:{\displaystyle \mathbb {R} } 417:, leading to the notions of 7: 4344:Algebras, rings and modules 4097: 3992:In commutative algebra, if 3129:indices, and transform via 2727:{\displaystyle f(ka)=kf(a)} 1761:being a linear subspace of 1745:, then this would define a 1559:of an algebra over a field 1247:is sometimes also called a 10: 4387: 4251:Monatshefte für Mathematik 3901:split-biquaternion algebra 3877: 3133:, while upper indices are 2902: 2438:Power-associative algebras 2327: 2180: 2000:-vector space (or module) 1779: 1733:If (3) were replaced with 1697:is closed under addition), 1551:Substructure (mathematics) 1548: 616:product of complex numbers 512:unital associative algebra 502:Many authors use the term 4346:. Vol. 1. Springer. 4190:Prolla, João B. (2011) . 3903:, which is isomorphic to 2681:, which one may write as 2254:functions defined on the 1458:is frequently written as 940:polynomial multiplication 545:Definition and motivation 394:. Thus, an algebra is an 4198:. Elsevier. p. 65. 4159: 2990:via the following rule: 2303:, which turns them into 2223:the commutative algebra 2008:to be zero. That is, if 1062:are any two elements of 423:non-associative algebras 379:(often simply called an 4286:Commutative Ring Theory 2336:non-associative algebra 2330:Non-associative algebra 2324:Non-associative algebra 2315:. These are studied in 1962:An algebra is called a 1541:-algebra homomorphism. 4283:Matsumura, H. (1989). 4104:Algebra over an operad 4091:Field with one element 4082: 4054: 4020: 4019:{\displaystyle R\to A} 3983: 3961: 3927: 3818: 3742: 3663: 3587: 3511: 3422: 3389: 3361:It remains to specify 3352: 3086: 3047: 2964:structure coefficients 2940:Thus, given the field 2899:Structure coefficients 2889: 2783: 2782:{\displaystyle a\in A} 2757: 2756:{\displaystyle k\in K} 2728: 2665:-algebra homomorphism 2640: 2581: 2507: 2387: 2278:partially ordered sets 1888: 1853: 1809:from any algebra over 1545:Subalgebras and ideals 1513: 985: 931: 886: 816: 769: 720: 676: 607: 4083: 4055: 4030:-module structure on 4021: 3984: 3962: 3928: 3819: 3743: 3664: 3588: 3512: 3423: 3390: 3353: 3137:, transforming under 3087: 3027: 2890: 2784: 2758: 2729: 2641: 2582: 2508: 2388: 2276:are built on certain 2264:holomorphic functions 2208:matrix multiplication 2159:in a polynomial ring 1990:direct sum of modules 1889: 1887:{\displaystyle A_{F}} 1854: 1514: 1302:Algebra homomorphisms 1179:Left distributivity: 994:matrix multiplication 986: 932: 887: 817: 770: 721: 677: 608: 454:matrix multiplication 404:scalar multiplication 4310:Kunz, Ernst (1985). 4124:Differential algebra 4064: 4042: 4004: 3971: 3941: 3907: 3859:is assumed to be an 3754: 3675: 3599: 3523: 3447: 3401: 3368: 3284: 3207:, then this becomes 3123:mathematical physics 2997: 2796: 2767: 2741: 2688: 2597: 2559: 2473: 2428:Alternative algebras 2408:vector cross product 2365: 2340:distributive algebra 1934:or identity element 1871: 1817: 1782:Extension of scalars 1776:Extension of scalars 1465: 1342:algebra homomorphism 960: 910: 831: 797: 735: 701: 622: 588: 539:inner product spaces 462:vector cross product 419:associative algebras 377:algebra over a field 256:Group with operators 199:Complemented lattice 34:Algebraic structures 18:Algebra homomorphism 4340:Hazewinkel, Michiel 4220:Schafer, Richard D. 4119:Composition algebra 4109:Alternative algebra 3935:quaternion algebras 3880:Associative algebra 3851:replaces the field 3842:algebra over a ring 3838:commutative algebra 2905:Structure constants 2317:functional analysis 2287:, for example on a 2191:the algebra of all 2183:Associative algebra 2177:Associative algebra 1986:unital zero algebra 1894:is an algebra over 1863:is an algebra over 1284:associative algebra 1080:that is called the 555: 550:Motivating examples 531:algebra over a ring 508:associative algebra 425:. Given an integer 396:algebraic structure 310:Composition algebra 70:Quasigroup and loop 4263:10.1007/BF01692479 4144:Mutation (algebra) 4078: 4050: 4016: 3979: 3957: 3923: 3814: 3813: 3738: 3737: 3659: 3658: 3583: 3582: 3507: 3506: 3418: 3417: 3385: 3384: 3348: 3347: 3082: 2959:), and specifying 2885: 2883: 2873: 2779: 2753: 2724: 2636: 2577: 2503: 2444:Algebras and rings 2383: 2274:Incidence algebras 2151:was introduced by 2136:, the unital zero 1884: 1849: 1509: 1243:. An algebra over 1050:, denoted here by 981: 927: 882: 812: 765: 716: 672: 603: 565:bilinear operator 554: 516:algebraic geometry 4296:978-0-521-36764-6 4205:978-0-08-087136-3 4180:Proposition 1.1.1 4134:Geometric algebra 3156:Einstein notation 2465:ring homomorphism 2433:Flexible algebras 2100:generated by the 1984:One may define a 1487: 1076:is an element of 1005: 1004: 876: 852: 762: 747: 406:by elements of a 369: 368: 16:(Redirected from 4378: 4357: 4326: 4325: 4307: 4301: 4300: 4280: 4274: 4273: 4246: 4240: 4239: 4216: 4210: 4209: 4187: 4181: 4170: 4149:Operator algebra 4139:Max-plus algebra 4114:Clifford algebra 4087: 4085: 4084: 4079: 4071: 4059: 4057: 4056: 4051: 4049: 4025: 4023: 4022: 4017: 3998:commutative ring 3988: 3986: 3985: 3980: 3978: 3966: 3964: 3963: 3958: 3956: 3948: 3932: 3930: 3929: 3924: 3922: 3914: 3870:-vector space). 3846:commutative ring 3823: 3821: 3820: 3815: 3747: 3745: 3744: 3739: 3668: 3666: 3665: 3660: 3592: 3590: 3589: 3584: 3516: 3514: 3513: 3508: 3427: 3425: 3424: 3419: 3394: 3392: 3391: 3386: 3357: 3355: 3354: 3349: 3111:form a basis of 3091: 3089: 3088: 3083: 3081: 3080: 3075: 3069: 3068: 3046: 3041: 3023: 3022: 3017: 3011: 3010: 3005: 2894: 2892: 2891: 2886: 2884: 2876: 2874: 2855: 2847: 2842: 2841: 2824: 2823: 2813: 2810: 2809: 2803: 2802: 2788: 2786: 2785: 2780: 2762: 2760: 2759: 2754: 2733: 2731: 2730: 2725: 2645: 2643: 2642: 2637: 2586: 2584: 2583: 2578: 2512: 2510: 2509: 2504: 2463:together with a 2392: 2390: 2389: 2384: 2354:equipped with a 2285:linear operators 2262:-algebra of all 2168: 2153:Bruno Buchberger 2128: 2095: 2085: 2067: 2035: 2021: 1972: 1954:in the algebra. 1893: 1891: 1890: 1885: 1883: 1882: 1858: 1856: 1855: 1850: 1845: 1844: 1829: 1828: 1540: 1527: 1518: 1516: 1515: 1510: 1490: 1489: 1488: 1485: 1479: 1457: 1451: 1445: 1439: 1421: 1415: 1409: 1403: 1393: 1366: 1349: 1339: 1333: 1323: 1317: 1311: 1273: 1265: 1257: 1251: 1246: 1234: 1208: 1176: 1137: 1133: 1129: 1121: 1117: 1103: 1095: 1091: 1087: 1079: 1075: 1065: 1061: 1057: 1053: 1049: 1045: 1034:binary operation 1031: 1023: 1015: 990: 988: 987: 982: 980: 979: 968: 936: 934: 933: 928: 917: 891: 889: 888: 883: 878: 877: 869: 854: 853: 845: 825:Hamilton product 821: 819: 818: 813: 811: 810: 805: 774: 772: 771: 766: 764: 763: 755: 749: 748: 740: 725: 723: 722: 717: 715: 714: 709: 681: 679: 678: 673: 671: 667: 646: 642: 612: 610: 609: 604: 602: 601: 596: 556: 553: 527:commutative ring 481:identity element 398:consisting of a 387:equipped with a 361: 354: 347: 136:Commutative ring 65:Rack and quandle 30: 29: 21: 4386: 4385: 4381: 4380: 4379: 4377: 4376: 4375: 4361: 4360: 4354: 4335: 4330: 4329: 4322: 4308: 4304: 4297: 4281: 4277: 4247: 4243: 4236: 4217: 4213: 4206: 4188: 4184: 4171: 4167: 4162: 4154:Zariski's lemma 4100: 4067: 4065: 4062: 4061: 4045: 4043: 4040: 4039: 4005: 4002: 4001: 3974: 3972: 3969: 3968: 3952: 3944: 3942: 3939: 3938: 3918: 3910: 3908: 3905: 3904: 3895:, and over the 3882: 3876: 3834: 3755: 3752: 3751: 3676: 3673: 3672: 3600: 3597: 3596: 3524: 3521: 3520: 3448: 3445: 3444: 3402: 3399: 3398: 3369: 3366: 3365: 3285: 3282: 3281: 3264: 3227: 3198: 3190: 3177: 3169: 3153: 3110: 3101: 3076: 3071: 3070: 3052: 3048: 3042: 3031: 3018: 3013: 3012: 3006: 3001: 3000: 2998: 2995: 2994: 2981: 2907: 2901: 2882: 2881: 2875: 2872: 2871: 2865: 2864: 2857: 2854: 2848: 2846: 2837: 2833: 2831: 2828: 2819: 2815: 2811: 2808: 2799: 2797: 2794: 2793: 2768: 2765: 2764: 2742: 2739: 2738: 2689: 2686: 2685: 2598: 2595: 2594: 2560: 2557: 2556: 2474: 2471: 2470: 2446: 2423:Jordan algebras 2401:Euclidean space 2366: 2363: 2362: 2342:) over a field 2332: 2326: 2305:Banach algebras 2237:polynomial ring 2185: 2179: 2160: 2118: 2117:for every pair 2116: 2108: 2091: 2084: 2075: 2069: 2037: 2023: 2009: 1967: 1960: 1920: 1904: 1878: 1874: 1872: 1869: 1868: 1840: 1836: 1824: 1820: 1818: 1815: 1814: 1788:field extension 1784: 1778: 1770:ideal of a ring 1751:two-sided ideal 1600:, we have that 1565:linear subspace 1553: 1547: 1536: 1523: 1484: 1480: 1469: 1468: 1466: 1463: 1462: 1453: 1447: 1441: 1438: 1432: 1423: 1417: 1411: 1405: 1395: 1368: 1354: 1345: 1335: 1329: 1319: 1313: 1307: 1304: 1299: 1282:to refer to an 1271: 1263: 1255: 1249: 1244: 1212: 1180: 1147: 1135: 1131: 1127: 1119: 1105: 1101: 1093: 1089: 1085: 1077: 1067: 1063: 1059: 1055: 1051: 1047: 1037: 1029: 1021: 1013: 1010: 969: 964: 963: 961: 958: 957: 953:square matrices 913: 911: 908: 907: 868: 867: 844: 843: 832: 829: 828: 827: 806: 801: 800: 798: 795: 794: 782:anticommutative 754: 753: 739: 738: 736: 733: 732: 731: 710: 705: 704: 702: 699: 698: 654: 650: 629: 625: 623: 620: 619: 618: 597: 592: 591: 589: 586: 585: 581:complex numbers 552: 547: 489:identity matrix 466:Jacobi identity 458:Euclidean space 450:matrix addition 438:square matrices 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: 4384: 4374: 4373: 4359: 4358: 4352: 4334: 4331: 4328: 4327: 4320: 4314:. Birkhauser. 4302: 4295: 4275: 4257:(1): 283–354, 4241: 4234: 4211: 4204: 4182: 4164: 4163: 4161: 4158: 4157: 4156: 4151: 4146: 4141: 4136: 4131: 4126: 4121: 4116: 4111: 4106: 4099: 4096: 4077: 4074: 4070: 4048: 4015: 4012: 4009: 3977: 3955: 3951: 3947: 3921: 3917: 3913: 3878:Main article: 3875: 3872: 3866:(instead of a 3833: 3830: 3826: 3825: 3812: 3809: 3806: 3803: 3800: 3797: 3794: 3790: 3786: 3783: 3780: 3777: 3773: 3769: 3766: 3763: 3760: 3749: 3736: 3733: 3730: 3727: 3724: 3721: 3718: 3715: 3711: 3707: 3704: 3701: 3698: 3694: 3690: 3687: 3684: 3681: 3670: 3657: 3654: 3651: 3648: 3645: 3642: 3639: 3635: 3631: 3628: 3625: 3622: 3618: 3614: 3611: 3608: 3605: 3594: 3581: 3578: 3575: 3572: 3569: 3566: 3563: 3559: 3555: 3552: 3549: 3546: 3542: 3538: 3535: 3532: 3529: 3518: 3505: 3502: 3499: 3496: 3493: 3490: 3487: 3483: 3479: 3476: 3473: 3470: 3466: 3462: 3459: 3456: 3453: 3430: 3429: 3416: 3413: 3410: 3407: 3396: 3383: 3380: 3377: 3374: 3359: 3358: 3346: 3342: 3339: 3336: 3333: 3330: 3326: 3322: 3319: 3316: 3313: 3310: 3306: 3302: 3299: 3296: 3293: 3290: 3263: 3260: 3236: 3235: 3219: 3205:index notation 3201: 3200: 3194: 3182: 3173: 3165: 3145: 3106: 3099: 3093: 3092: 3079: 3074: 3067: 3064: 3061: 3058: 3055: 3051: 3045: 3040: 3037: 3034: 3030: 3026: 3021: 3016: 3009: 3004: 2969: 2951:by giving its 2903:Main article: 2900: 2897: 2896: 2895: 2880: 2877: 2870: 2867: 2866: 2863: 2860: 2859: 2856: 2853: 2850: 2849: 2845: 2840: 2836: 2832: 2829: 2827: 2822: 2818: 2814: 2812: 2807: 2804: 2801: 2778: 2775: 2772: 2752: 2749: 2746: 2735: 2734: 2723: 2720: 2717: 2714: 2711: 2708: 2705: 2702: 2699: 2696: 2693: 2647: 2646: 2635: 2632: 2629: 2626: 2623: 2620: 2617: 2614: 2611: 2608: 2605: 2602: 2588: 2587: 2576: 2573: 2570: 2567: 2564: 2514: 2513: 2502: 2499: 2496: 2493: 2490: 2487: 2484: 2481: 2478: 2445: 2442: 2441: 2440: 2435: 2430: 2425: 2420: 2415: 2410: 2382: 2379: 2376: 2373: 2370: 2350:-vector space 2328:Main article: 2325: 2322: 2321: 2320: 2281: 2271: 2246:, such as the 2240: 2221: 2214:group algebras 2211: 2181:Main article: 2178: 2175: 2112: 2104: 2086:is a basis of 2080: 2073: 1988:by taking the 1959: 1956: 1922:An algebra is 1919: 1918:Unital algebra 1916: 1903: 1900: 1881: 1877: 1848: 1843: 1839: 1835: 1832: 1827: 1823: 1801:that contains 1780:Main article: 1777: 1774: 1731: 1730: 1712: 1698: 1549:Main article: 1546: 1543: 1520: 1519: 1508: 1505: 1502: 1499: 1496: 1493: 1483: 1478: 1475: 1472: 1434: 1428: 1303: 1300: 1298: 1297:Basic concepts 1295: 1268:multiplication 1258:is called the 1237: 1236: 1209: 1177: 1144:distributivity 1009: 1006: 1003: 1002: 999: 996: 991: 978: 975: 972: 967: 955: 949: 948: 945: 942: 937: 926: 923: 920: 916: 905: 899: 898: 895: 892: 881: 875: 872: 866: 863: 860: 857: 851: 848: 842: 839: 836: 822: 809: 804: 792: 786: 785: 778: 775: 761: 758: 752: 746: 743: 726: 713: 708: 696: 695:of 3D vectors 689: 688: 685: 682: 670: 666: 663: 660: 657: 653: 649: 645: 641: 638: 635: 632: 628: 613: 600: 595: 583: 577: 576: 571: 566: 563: 560: 551: 548: 546: 543: 471:An algebra is 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: 4383: 4372: 4369: 4368: 4366: 4355: 4353:1-4020-2690-0 4349: 4345: 4341: 4337: 4336: 4323: 4321:0-8176-3065-1 4317: 4313: 4306: 4298: 4292: 4288: 4287: 4279: 4272: 4268: 4264: 4260: 4256: 4252: 4245: 4237: 4235:0-486-68813-5 4231: 4227: 4226: 4221: 4215: 4207: 4201: 4197: 4193: 4186: 4179: 4175: 4169: 4165: 4155: 4152: 4150: 4147: 4145: 4142: 4140: 4137: 4135: 4132: 4130: 4127: 4125: 4122: 4120: 4117: 4115: 4112: 4110: 4107: 4105: 4102: 4101: 4095: 4093: 4092: 4075: 4037: 4033: 4029: 4013: 4007: 3999: 3995: 3990: 3949: 3936: 3915: 3902: 3898: 3894: 3890: 3887: 3881: 3871: 3869: 3865: 3863: 3858: 3854: 3850: 3847: 3843: 3839: 3829: 3810: 3807: 3804: 3801: 3798: 3795: 3792: 3788: 3784: 3781: 3778: 3775: 3771: 3767: 3764: 3761: 3758: 3750: 3734: 3731: 3728: 3725: 3722: 3719: 3716: 3713: 3709: 3705: 3702: 3699: 3696: 3692: 3688: 3685: 3682: 3679: 3671: 3655: 3652: 3649: 3646: 3643: 3640: 3637: 3633: 3629: 3626: 3623: 3620: 3616: 3612: 3609: 3606: 3603: 3595: 3579: 3576: 3573: 3570: 3567: 3564: 3561: 3557: 3553: 3550: 3547: 3544: 3540: 3536: 3533: 3530: 3527: 3519: 3503: 3500: 3497: 3494: 3491: 3488: 3485: 3481: 3477: 3474: 3471: 3468: 3464: 3460: 3457: 3454: 3451: 3443: 3442: 3441: 3439: 3435: 3414: 3411: 3408: 3405: 3397: 3381: 3378: 3375: 3372: 3364: 3363: 3362: 3344: 3340: 3337: 3334: 3331: 3328: 3324: 3320: 3317: 3314: 3311: 3308: 3304: 3300: 3297: 3294: 3291: 3288: 3280: 3279: 3278: 3276: 3271: 3269: 3259: 3257: 3253: 3249: 3245: 3241: 3233: 3230: 3226: 3222: 3218: 3214: 3210: 3209: 3208: 3206: 3197: 3193: 3189: 3185: 3181: 3176: 3172: 3168: 3164: 3161: 3160: 3159: 3157: 3152: 3148: 3144: 3140: 3136: 3135:contravariant 3132: 3128: 3124: 3119: 3116: 3114: 3109: 3105: 3098: 3077: 3065: 3062: 3059: 3056: 3053: 3049: 3043: 3038: 3035: 3032: 3028: 3024: 3019: 3007: 2993: 2992: 2991: 2989: 2985: 2980: 2976: 2972: 2968: 2965: 2962: 2958: 2954: 2950: 2947: 2943: 2938: 2936: 2932: 2928: 2924: 2920: 2916: 2912: 2906: 2878: 2861: 2851: 2838: 2834: 2820: 2816: 2805: 2792: 2791: 2790: 2776: 2773: 2770: 2750: 2747: 2744: 2718: 2712: 2709: 2706: 2700: 2697: 2691: 2684: 2683: 2682: 2680: 2676: 2672: 2668: 2664: 2660: 2656: 2652: 2633: 2630: 2624: 2618: 2609: 2606: 2603: 2593: 2592: 2591: 2574: 2568: 2565: 2562: 2555: 2554: 2553: 2551: 2547: 2543: 2539: 2535: 2531: 2527: 2523: 2519: 2500: 2494: 2488: 2482: 2479: 2476: 2469: 2468: 2467: 2466: 2462: 2459: 2455: 2451: 2439: 2436: 2434: 2431: 2429: 2426: 2424: 2421: 2419: 2416: 2414: 2411: 2409: 2405: 2402: 2399: 2398: 2397: 2394: 2380: 2374: 2371: 2368: 2361: 2357: 2353: 2349: 2345: 2341: 2337: 2331: 2318: 2314: 2310: 2306: 2302: 2298: 2294: 2290: 2289:Hilbert space 2286: 2282: 2279: 2275: 2272: 2269: 2268:complex plane 2265: 2261: 2257: 2253: 2249: 2245: 2241: 2238: 2234: 2230: 2226: 2222: 2219: 2215: 2212: 2209: 2205: 2201: 2198: 2194: 2190: 2189: 2188: 2184: 2174: 2172: 2167: 2163: 2158: 2154: 2150: 2149:Gröbner bases 2146: 2141: 2139: 2135: 2130: 2126: 2122: 2115: 2111: 2107: 2103: 2099: 2094: 2089: 2083: 2079: 2072: 2065: 2061: 2057: 2053: 2049: 2045: 2041: 2034: 2030: 2026: 2020: 2016: 2012: 2007: 2003: 1999: 1995: 1991: 1987: 1982: 1980: 1976: 1970: 1965: 1955: 1953: 1949: 1945: 1941: 1937: 1933: 1929: 1925: 1915: 1913: 1912:associativity 1909: 1908:commutativity 1899: 1897: 1879: 1875: 1866: 1862: 1846: 1841: 1837: 1833: 1830: 1825: 1821: 1812: 1808: 1804: 1800: 1796: 1792: 1789: 1786:If we have a 1783: 1773: 1771: 1766: 1764: 1760: 1756: 1752: 1748: 1744: 1740: 1736: 1728: 1724: 1720: 1716: 1713: 1710: 1706: 1702: 1699: 1696: 1692: 1688: 1684: 1681: 1680: 1679: 1677: 1673: 1669: 1665: 1661: 1657: 1653: 1649: 1645: 1641: 1637: 1633: 1628: 1625: 1623: 1619: 1615: 1611: 1607: 1603: 1599: 1595: 1591: 1587: 1583: 1579: 1575: 1571: 1566: 1562: 1558: 1552: 1542: 1539: 1535: 1531: 1526: 1506: 1500: 1497: 1494: 1481: 1461: 1460: 1459: 1456: 1450: 1444: 1437: 1431: 1426: 1420: 1414: 1408: 1402: 1398: 1391: 1387: 1383: 1379: 1375: 1371: 1365: 1361: 1357: 1353: 1348: 1343: 1338: 1334:-algebras or 1332: 1327: 1322: 1316: 1310: 1294: 1292: 1287: 1285: 1281: 1277: 1269: 1261: 1253: 1242: 1232: 1228: 1224: 1220: 1216: 1210: 1207: 1203: 1199: 1195: 1191: 1187: 1183: 1178: 1175: 1171: 1167: 1163: 1159: 1155: 1151: 1145: 1141: 1140: 1139: 1125: 1116: 1112: 1108: 1099: 1083: 1074: 1070: 1054:(that is, if 1044: 1040: 1035: 1027: 1019: 1000: 997: 995: 992: 976: 973: 970: 956: 954: 951: 950: 946: 943: 941: 938: 921: 906: 904: 901: 900: 896: 893: 870: 864: 861: 846: 840: 837: 826: 823: 807: 793: 791: 788: 787: 783: 779: 776: 756: 750: 741: 730: 729:cross product 727: 711: 697: 694: 693:cross product 691: 690: 686: 683: 668: 664: 661: 658: 655: 651: 647: 643: 639: 636: 633: 630: 626: 617: 614: 598: 584: 582: 579: 578: 575: 574:commutativity 572: 570: 569:associativity 567: 564: 562:vector space 561: 558: 557: 542: 540: 536: 535:bilinear form 532: 528: 523: 521: 517: 513: 509: 505: 500: 498: 497:(unital) ring 494: 490: 486: 482: 479:if it has an 478: 474: 469: 467: 463: 459: 455: 451: 447: 443: 439: 436: 432: 428: 424: 420: 416: 411: 409: 405: 401: 397: 393: 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: 4343: 4311: 4305: 4285: 4278: 4254: 4250: 4244: 4224: 4214: 4195: 4192:"Lemma 4.10" 4185: 4168: 4129:Free algebra 4089: 4035: 4031: 4027: 3993: 3991: 3888: 3883: 3867: 3861: 3856: 3852: 3848: 3841: 3835: 3827: 3437: 3433: 3431: 3360: 3274: 3272: 3268:Eduard Study 3265: 3255: 3251: 3243: 3239: 3237: 3231: 3228: 3224: 3220: 3216: 3212: 3202: 3195: 3191: 3187: 3183: 3179: 3174: 3170: 3166: 3162: 3150: 3146: 3142: 3139:pushforwards 3120: 3117: 3112: 3107: 3103: 3096: 3094: 2987: 2982:, which are 2978: 2974: 2970: 2966: 2963: 2960: 2956: 2941: 2939: 2934: 2930: 2926: 2925:elements of 2918: 2914: 2910: 2908: 2736: 2678: 2674: 2670: 2666: 2662: 2658: 2654: 2650: 2648: 2589: 2545: 2537: 2533: 2529: 2521: 2517: 2515: 2460: 2453: 2449: 2447: 2418:Lie algebras 2403: 2395: 2360:bilinear map 2355: 2351: 2347: 2343: 2339: 2335: 2333: 2301:Banach space 2283:algebras of 2259: 2247: 2242:algebras of 2232: 2224: 2203: 2196: 2192: 2186: 2170: 2165: 2161: 2142: 2137: 2134:dual numbers 2131: 2124: 2120: 2113: 2109: 2105: 2101: 2092: 2087: 2081: 2077: 2070: 2063: 2059: 2055: 2051: 2047: 2043: 2039: 2032: 2028: 2024: 2018: 2014: 2010: 2005: 2001: 1997: 1993: 1985: 1983: 1978: 1974: 1968: 1964:zero algebra 1963: 1961: 1958:Zero algebra 1951: 1947: 1943: 1939: 1935: 1930:if it has a 1927: 1923: 1921: 1905: 1895: 1864: 1860: 1810: 1806: 1802: 1798: 1794: 1790: 1785: 1767: 1762: 1758: 1754: 1750: 1746: 1742: 1738: 1734: 1732: 1726: 1722: 1718: 1714: 1708: 1704: 1700: 1694: 1690: 1686: 1682: 1675: 1671: 1667: 1663: 1659: 1655: 1651: 1647: 1643: 1639: 1635: 1631: 1629: 1626: 1621: 1617: 1613: 1609: 1605: 1601: 1597: 1593: 1589: 1585: 1581: 1577: 1573: 1569: 1560: 1556: 1554: 1537: 1524: 1521: 1454: 1448: 1442: 1435: 1429: 1424: 1418: 1412: 1406: 1400: 1396: 1389: 1385: 1381: 1377: 1373: 1369: 1363: 1359: 1355: 1346: 1341: 1336: 1330: 1326:homomorphism 1320: 1314: 1308: 1305: 1288: 1279: 1267: 1259: 1248: 1238: 1230: 1226: 1222: 1218: 1214: 1205: 1201: 1197: 1193: 1189: 1185: 1181: 1173: 1169: 1165: 1161: 1157: 1153: 1149: 1114: 1110: 1106: 1097: 1081: 1072: 1068: 1042: 1038: 1026:vector space 1011: 524: 519: 511: 507: 503: 501: 492: 484: 476: 472: 470: 446:real numbers 441: 426: 412: 385:vector space 380: 376: 370: 330:Hopf algebra 291: 283: 268: 261:Vector space 226: 166: 95:Group theory 93: 58: / 4026:defines an 3248:free module 2949:isomorphism 2661:, a unital 2313:C*-algebras 2309:B*-algebras 2293:composition 2229:polynomials 1747:right ideal 1620:are all in 1530:isomorphism 1291:commutative 1276:associative 903:polynomials 790:quaternions 415:associative 373:mathematics 315:Lie algebra 300:Associative 204:Total order 194:Semilattice 168:Ring theory 4333:References 4176:, p.  3989:-algebra. 3844:, where a 2653:-algebras 2544:, or that 2252:continuous 2216:, where a 1632:left ideal 1557:subalgebra 1367:such that 1352:linear map 1312:-algebras 1260:base field 1020:, and let 1008:Definition 4271:121426669 4172:See also 4073:→ 4011:→ 3950:× 3916:× 3723:− 3332:⋅ 3312:⋅ 3292:⋅ 3131:pullbacks 3127:covariant 3029:∑ 2953:dimension 2869:⟶ 2844:↘ 2835:η 2826:↙ 2817:η 2774:∈ 2748:∈ 2619:η 2616:↦ 2590:given by 2572:→ 2566:× 2550:injective 2542:zero ring 2524:) is the 2486:→ 2480:: 2477:η 2413:Octonions 2378:→ 2372:× 2258:, or the 2244:functions 1838:⊗ 1646:-algebra 1576:-algebra 1534:bijective 1528:-algebra 1092:). Then 974:× 874:→ 850:→ 760:→ 751:× 745:→ 648:⋅ 491:of order 468:instead. 440:of order 325:Bialgebra 131:Near-ring 88:Lie group 56:Semigroup 4371:Algebras 4365:Category 4222:(1996). 4098:See also 3897:integers 2737:for all 2532:. Since 2297:topology 2256:interval 2200:matrices 1973:for all 1950:for all 1859:. So if 1394:for all 1252:-algebra 1241:bilinear 559:Algebra 506:to mean 389:bilinear 161:Lie ring 126:Semiring 3864:-module 2984:scalars 2913:× 2540:is the 2227:of all 2145:modules 2096:by the 2036:, then 1928:unitary 1867:, then 1280:algebra 1124:scalars 1098:algebra 1082:product 1066:, then 537:, like 504:algebra 477:unitary 392:product 383:) is a 381:algebra 292:Algebra 284:Algebra 189:Lattice 180:Lattice 4350:  4318:  4293:  4269:  4232:  4202:  3893:center 3095:where 2526:center 2516:where 2157:ideals 2076:, ... 1996:and a 1924:unital 1741:is in 1721:is in 1703:is in 1689:is in 1616:, and 1306:Given 1254:, and 1142:Right 1096:is an 473:unital 448:under 429:, the 320:Graded 251:Module 242:Module 141:Domain 60:Monoid 4267:S2CID 4160:Notes 3996:is a 3250:over 3246:is a 3102:,..., 2955:(say 2946:up to 2923:basis 2456:is a 2346:is a 2235:(see 2231:over 2218:group 2098:ideal 2068:. If 1938:with 1755:ideal 1642:of a 1634:of a 1572:of a 1563:is a 1532:is a 1433:) = 1 1410:. If 1344:is a 1221:) = ( 1217:) · ( 1100:over 1036:from 1028:over 1024:be a 1018:field 1016:be a 510:, or 408:field 375:, an 286:-like 244:-like 182:-like 151:Field 109:-like 83:Magma 51:Group 45:-like 43:Group 4348:ISBN 4316:ISBN 4291:ISBN 4230:ISBN 4200:ISBN 3886:ring 3436:and 3215:) = 2763:and 2657:and 2458:ring 2338:(or 2311:and 2195:-by- 2155:for 2054:) = 2022:and 1932:unit 1749:. A 1670:and 1654:and 1592:and 1486:-alg 1452:and 1416:and 1376:) = 1324:, a 1318:and 1192:) = 1156:) · 1130:and 1088:and 1058:and 1012:Let 998:Yes 947:Yes 944:Yes 894:Yes 780:No ( 687:Yes 684:Yes 452:and 435:real 431:ring 421:and 116:Ring 107:Ring 4259:doi 3238:If 3158:as 3121:In 2917:to 2548:is 2528:of 2058:+ ( 2046:) ( 1971:= 0 1966:if 1926:or 1910:or 1674:in 1666:in 1658:in 1596:in 1588:in 1404:in 1328:of 1270:in 1262:of 1225:) ( 1184:· ( 1134:in 1118:in 1084:of 1046:to 1001:No 897:No 777:No 475:or 433:of 400:set 371:In 121:Rng 4367:: 4265:, 4253:, 4228:. 4194:. 3884:A 3270:. 3213:xy 3178:= 3115:. 2673:→ 2669:: 2334:A 2239:). 2164:= 2129:. 2123:, 2064:μu 2062:+ 2060:λv 2056:λμ 2050:+ 2042:+ 2031:∈ 2027:, 2017:∈ 2013:, 1977:, 1969:uv 1948:xI 1946:= 1942:= 1940:Ix 1898:. 1831::= 1737:· 1717:· 1701:cx 1685:+ 1662:, 1630:A 1624:. 1618:cx 1612:+ 1608:, 1604:· 1584:, 1555:A 1522:A 1427:(1 1399:, 1384:) 1374:xy 1362:→ 1358:: 1286:. 1229:· 1223:ab 1219:by 1215:ax 1204:· 1200:+ 1196:· 1188:+ 1172:· 1168:+ 1164:· 1160:= 1152:+ 1146:: 1138:: 1126:) 1113:, 1109:, 1071:· 1041:× 784:) 522:. 518:, 4356:. 4324:. 4299:. 4261:: 4255:1 4238:. 4208:. 4178:3 4076:A 4069:Z 4047:Z 4036:R 4032:A 4028:R 4014:A 4008:R 3994:A 3976:R 3954:R 3946:R 3920:H 3912:H 3889:A 3868:K 3862:R 3857:A 3853:K 3849:R 3811:0 3808:= 3805:a 3802:b 3799:= 3796:b 3793:a 3789:, 3785:0 3782:= 3779:b 3776:b 3772:, 3768:0 3765:= 3762:a 3759:a 3735:b 3732:= 3729:a 3726:b 3720:= 3717:b 3714:a 3710:, 3706:0 3703:= 3700:b 3697:b 3693:, 3689:1 3686:= 3683:a 3680:a 3656:0 3653:= 3650:a 3647:b 3644:= 3641:b 3638:a 3634:, 3630:0 3627:= 3624:b 3621:b 3617:, 3613:b 3610:= 3607:a 3604:a 3580:0 3577:= 3574:a 3571:b 3568:= 3565:b 3562:a 3558:, 3554:0 3551:= 3548:b 3545:b 3541:, 3537:a 3534:= 3531:a 3528:a 3504:0 3501:= 3498:a 3495:b 3492:= 3489:b 3486:a 3482:, 3478:b 3475:= 3472:b 3469:b 3465:, 3461:a 3458:= 3455:a 3452:a 3438:b 3434:a 3415:0 3412:= 3409:a 3406:a 3382:1 3379:= 3376:a 3373:a 3345:. 3341:a 3338:= 3335:1 3329:a 3325:, 3321:a 3318:= 3315:a 3309:1 3305:, 3301:1 3298:= 3295:1 3289:1 3275:a 3256:A 3252:K 3244:A 3240:K 3234:. 3232:y 3229:x 3225:j 3223:, 3221:i 3217:c 3211:( 3199:. 3196:k 3192:e 3188:j 3186:, 3184:i 3180:c 3175:j 3171:e 3167:i 3163:e 3151:j 3149:, 3147:i 3143:c 3113:A 3108:n 3104:e 3100:1 3097:e 3078:k 3073:e 3066:k 3063:, 3060:j 3057:, 3054:i 3050:c 3044:n 3039:1 3036:= 3033:k 3025:= 3020:j 3015:e 3008:i 3003:e 2988:A 2979:k 2977:, 2975:j 2973:, 2971:i 2967:c 2961:n 2957:n 2942:K 2935:A 2931:A 2927:A 2919:A 2915:A 2911:A 2879:B 2862:f 2852:A 2839:B 2821:A 2806:K 2777:A 2771:a 2751:K 2745:k 2722:) 2719:a 2716:( 2713:f 2710:k 2707:= 2704:) 2701:a 2698:k 2695:( 2692:f 2679:η 2675:B 2671:A 2667:f 2663:K 2659:B 2655:A 2651:K 2634:. 2631:a 2628:) 2625:k 2622:( 2613:) 2610:a 2607:, 2604:k 2601:( 2575:A 2569:A 2563:K 2546:η 2538:A 2534:η 2530:A 2522:A 2520:( 2518:Z 2501:, 2498:) 2495:A 2492:( 2489:Z 2483:K 2461:A 2454:K 2450:K 2404:R 2381:A 2375:A 2369:A 2358:- 2356:K 2352:A 2348:K 2344:K 2319:. 2280:. 2260:C 2248:R 2233:K 2225:K 2210:. 2204:K 2197:n 2193:n 2171:R 2166:K 2162:R 2138:R 2127:) 2125:j 2121:i 2119:( 2114:j 2110:E 2106:i 2102:E 2093:K 2088:V 2082:d 2078:e 2074:1 2071:e 2066:) 2052:v 2048:μ 2044:u 2040:λ 2038:( 2033:V 2029:v 2025:u 2019:K 2015:μ 2011:λ 2006:V 2002:V 1998:K 1994:K 1979:v 1975:u 1952:x 1944:x 1936:I 1896:F 1880:F 1876:A 1865:K 1861:A 1847:F 1842:K 1834:V 1826:F 1822:V 1811:K 1807:F 1803:K 1799:F 1795:K 1793:/ 1791:F 1763:A 1759:L 1743:L 1739:z 1735:x 1727:L 1725:( 1723:L 1719:x 1715:z 1709:L 1707:( 1705:L 1695:L 1693:( 1691:L 1687:y 1683:x 1676:K 1672:c 1668:A 1664:z 1660:L 1656:y 1652:x 1648:A 1644:K 1640:L 1636:K 1622:L 1614:y 1610:x 1606:y 1602:x 1598:K 1594:c 1590:L 1586:y 1582:x 1578:A 1574:K 1570:L 1561:K 1538:K 1525:K 1507:. 1504:) 1501:B 1498:, 1495:A 1492:( 1482:K 1477:m 1474:o 1471:H 1455:B 1449:A 1443:K 1436:B 1430:A 1425:f 1419:B 1413:A 1407:A 1401:y 1397:x 1392:) 1390:y 1388:( 1386:f 1382:x 1380:( 1378:f 1372:( 1370:f 1364:B 1360:A 1356:f 1350:- 1347:K 1340:- 1337:K 1331:K 1321:B 1315:A 1309:K 1272:A 1264:A 1256:K 1250:K 1245:K 1235:. 1233:) 1231:y 1227:x 1213:( 1206:y 1202:z 1198:x 1194:z 1190:y 1186:x 1182:z 1174:z 1170:y 1166:z 1162:x 1158:z 1154:y 1150:x 1148:( 1136:K 1132:b 1128:a 1120:A 1115:z 1111:y 1107:x 1102:K 1094:A 1090:y 1086:x 1078:A 1073:y 1069:x 1064:A 1060:y 1056:x 1052:· 1048:A 1043:A 1039:A 1030:K 1022:A 1014:K 977:n 971:n 966:R 925:] 922:X 919:[ 915:R 880:) 871:w 865:+ 862:b 859:( 856:) 847:v 841:+ 838:a 835:( 808:4 803:R 757:b 742:a 712:3 707:R 669:) 665:d 662:i 659:+ 656:c 652:( 644:) 640:b 637:i 634:+ 631:a 627:( 599:2 594:R 493:n 485:n 442:n 427:n 360:e 353:t 346:v 20:)

Index

Algebra homomorphism
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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