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Artin–Tate lemma

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is Noetherian, the statement of the Artin–Tate lemma is no longer true. Indeed, for any non-Noetherian ring
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E Artin, J.T Tate, "A note on finite ring extensions," J. Math. Soc Japan, Volume 3, 1951, pp. 74–77
589: 949: 76: 1080: 454:{\displaystyle x_{i}=\sum _{j}b_{ij}y_{j}\quad {\text{and}}\quad y_{i}y_{j}=\sum _{k}b_{ijk}y_{k}} 839: 119: 954: 50: 1084: 1043: 1072: 41: 17: 732: 705: 658: 562: 44: 1068: 1035: 799: 779: 759: 685: 638: 542: 522: 312: 292: 226: 206: 1113: 1104: 29: 118:".) The lemma was introduced by E. Artin and J. Tate in 1951 to give a 1042:, Graduate Texts in Mathematics, 150, Springer-Verlag, 1995, 157:
The following proof can be found in Atiyah–MacDonald. Let
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Commutative Algebra with a View Toward Algebraic Geometry
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Then we can write 145:is a Noetherian ring, then 1146: 970:{\displaystyle I\subset A} 112:finitely generated algebra 66:{\displaystyle B\subset C} 124:Hilbert's Nullstellensatz 116:finitely generated module 796:is a finitely generated 756:is a finitely generated 1120:Theorems about algebras 102:is of finite type over 86:is of finite type over 28:and his former advisor 1009: 971: 942: 862: 836:-algebra structure on 810: 790: 770: 750: 723: 696: 676: 649: 629: 580: 553: 533: 513: 455: 323: 303: 283: 237: 217: 197: 149:is a Noetherian ring. 114:" and "finite" means " 67: 1010: 972: 943: 863: 811: 791: 771: 751: 749:{\displaystyle B_{0}} 724: 722:{\displaystyle B_{0}} 697: 677: 675:{\displaystyle B_{0}} 650: 630: 581: 579:{\displaystyle B_{0}} 554: 534: 514: 456: 324: 304: 284: 238: 218: 198: 68: 981: 955: 872: 840: 820:Noetherian necessary 800: 780: 760: 733: 706: 686: 682:is Noetherian, also 659: 639: 590: 563: 543: 523: 468: 336: 313: 293: 247: 227: 207: 161: 131:Eakin–Nagata theorem 51: 1130:Commutative algebra 539:is finite over the 1005: 967: 938: 858: 806: 786: 766: 746: 719: 692: 672: 645: 625: 576: 549: 529: 509: 451: 424: 361: 319: 299: 279: 233: 213: 193: 63: 1125:Lemmas in algebra 1091:. Proposition 7.8 832:we can define an 809:{\displaystyle A} 789:{\displaystyle B} 769:{\displaystyle A} 695:{\displaystyle B} 648:{\displaystyle A} 586:generated by the 552:{\displaystyle A} 532:{\displaystyle C} 415: 389: 352: 322:{\displaystyle B} 302:{\displaystyle C} 243:-algebra and let 236:{\displaystyle A} 216:{\displaystyle C} 133:, which says: if 1137: 1092: 1066: 1060: 1057: 1051: 1033: 1014: 1012: 1011: 1006: 976: 974: 973: 968: 947: 945: 944: 939: 867: 865: 864: 859: 815: 813: 812: 807: 795: 793: 792: 787: 775: 773: 772: 767: 755: 753: 752: 747: 745: 744: 728: 726: 725: 720: 718: 717: 701: 699: 698: 693: 681: 679: 678: 673: 671: 670: 654: 652: 651: 646: 634: 632: 631: 626: 624: 623: 605: 604: 585: 583: 582: 577: 575: 574: 558: 556: 555: 550: 538: 536: 535: 530: 518: 516: 515: 510: 502: 501: 483: 482: 460: 458: 457: 452: 450: 449: 440: 439: 423: 411: 410: 401: 400: 390: 387: 384: 383: 374: 373: 360: 348: 347: 328: 326: 325: 320: 308: 306: 305: 300: 288: 286: 285: 280: 278: 277: 259: 258: 242: 240: 239: 234: 222: 220: 219: 214: 202: 200: 199: 194: 192: 191: 173: 172: 72: 70: 69: 64: 22:Artin–Tate lemma 1145: 1144: 1140: 1139: 1138: 1136: 1135: 1134: 1110: 1109: 1101: 1096: 1095: 1067: 1063: 1058: 1054: 1050:, Exercise 4.32 1036:Eisenbud, David 1034: 1030: 1025: 979: 978: 953: 952: 948:. Then for any 870: 869: 838: 837: 822: 798: 797: 778: 777: 776:-algebra, also 758: 757: 736: 731: 730: 709: 704: 703: 702:is finite over 684: 683: 662: 657: 656: 637: 636: 609: 593: 588: 587: 566: 561: 560: 541: 540: 521: 520: 487: 471: 466: 465: 441: 425: 402: 392: 375: 362: 339: 334: 333: 311: 310: 291: 290: 269: 250: 245: 244: 225: 224: 205: 204: 183: 164: 159: 158: 155: 137:is finite over 94:is finite over 49: 48: 45:Noetherian ring 12: 11: 5: 1143: 1141: 1133: 1132: 1127: 1122: 1112: 1111: 1108: 1107: 1100: 1099:External links 1097: 1094: 1093: 1081:Addison–Wesley 1073:I.G. Macdonald 1061: 1052: 1027: 1026: 1024: 1021: 1004: 1001: 998: 995: 992: 989: 986: 966: 963: 960: 937: 934: 931: 928: 925: 922: 919: 916: 913: 910: 907: 904: 901: 898: 895: 892: 889: 886: 883: 880: 877: 857: 854: 851: 848: 845: 821: 818: 805: 785: 765: 743: 739: 716: 712: 691: 669: 665: 644: 622: 619: 616: 612: 608: 603: 600: 596: 573: 569: 548: 528: 508: 505: 500: 497: 494: 490: 486: 481: 478: 474: 462: 461: 448: 444: 438: 435: 432: 428: 422: 418: 414: 409: 405: 399: 395: 382: 378: 372: 369: 365: 359: 355: 351: 346: 342: 318: 298: 276: 272: 268: 265: 262: 257: 253: 232: 212: 190: 186: 182: 179: 176: 171: 167: 154: 151: 108: 107: 77:algebras over 62: 59: 56: 24:, named after 13: 10: 9: 6: 4: 3: 2: 1142: 1131: 1128: 1126: 1123: 1121: 1118: 1117: 1115: 1106: 1103: 1102: 1098: 1090: 1089:0-201-40751-5 1086: 1082: 1078: 1074: 1070: 1065: 1062: 1056: 1053: 1049: 1048:0-387-94268-8 1045: 1041: 1037: 1032: 1029: 1022: 1020: 1018: 1002: 999: 996: 993: 990: 987: 984: 964: 961: 958: 951: 932: 929: 926: 923: 920: 917: 914: 911: 905: 899: 896: 893: 884: 881: 878: 868:by declaring 855: 852: 849: 846: 843: 835: 831: 827: 819: 817: 803: 783: 763: 741: 737: 714: 710: 689: 667: 663: 642: 635:. Using that 620: 617: 614: 610: 606: 601: 598: 594: 571: 567: 546: 526: 506: 503: 498: 495: 492: 488: 484: 479: 476: 472: 446: 442: 436: 433: 430: 426: 420: 416: 412: 407: 403: 397: 393: 380: 376: 370: 367: 363: 357: 353: 349: 344: 340: 332: 331: 330: 316: 296: 274: 270: 266: 263: 260: 255: 251: 230: 210: 188: 184: 180: 177: 174: 169: 165: 152: 150: 148: 144: 140: 136: 132: 127: 125: 121: 117: 113: 105: 101: 97: 93: 89: 85: 81: 80: 75: 60: 57: 54: 46: 43: 39: 35: 34: 33: 31: 27: 23: 19: 1076: 1064: 1055: 1039: 1031: 1016: 833: 829: 825: 823: 463: 156: 146: 142: 138: 134: 128: 109: 103: 99: 95: 91: 87: 83: 78: 37: 21: 15: 74:commutative 42:commutative 1114:Categories 1023:References 816:-algebra. 655:and hence 32:, states: 30:Emil Artin 1069:M. Atiyah 1000:⊂ 994:⊕ 962:⊂ 853:⊕ 559:-algebra 504:∈ 417:∑ 354:∑ 289:generate 264:… 203:generate 178:… 58:⊂ 26:John Tate 1083:, 1994. 729:. Since 519:. Then 98:, then 90:and if 18:algebra 1087:  1046:  223:as an 20:, the 950:ideal 464:with 309:as a 153:Proof 120:proof 82:. If 40:be a 1085:ISBN 1044:ISBN 141:and 47:and 36:Let 388:and 122:of 16:In 1116:: 1079:, 1075:, 1071:, 1038:, 126:. 1017:A 1003:C 997:I 991:A 988:= 985:B 965:A 959:I 936:) 933:y 930:a 927:+ 924:x 921:b 918:, 915:b 912:a 909:( 906:= 903:) 900:y 897:, 894:b 891:( 888:) 885:x 882:, 879:a 876:( 856:A 850:A 847:= 844:C 834:A 830:A 826:A 804:A 784:B 764:A 742:0 738:B 715:0 711:B 690:B 668:0 664:B 643:A 621:k 618:j 615:i 611:b 607:, 602:j 599:i 595:b 572:0 568:B 547:A 527:C 507:B 499:k 496:j 493:i 489:b 485:, 480:j 477:i 473:b 447:k 443:y 437:k 434:j 431:i 427:b 421:k 413:= 408:j 404:y 398:i 394:y 381:j 377:y 371:j 368:i 364:b 358:j 350:= 345:i 341:x 317:B 297:C 275:n 271:y 267:, 261:, 256:1 252:y 231:A 211:C 189:m 185:x 181:, 175:, 170:1 166:x 147:B 143:C 139:B 135:C 106:. 104:A 100:B 96:B 92:C 88:A 84:C 79:A 61:C 55:B 38:A

Index

algebra
John Tate
Emil Artin
commutative
Noetherian ring
commutative
algebras over A
finitely generated algebra
finitely generated module
proof
Hilbert's Nullstellensatz
Eakin–Nagata theorem
ideal
Eisenbud, David
ISBN
0-387-94268-8
M. Atiyah
I.G. Macdonald
Addison–Wesley
ISBN
0-201-40751-5
http://commalg.subwiki.org/Artin-Tate_lemma
Categories
Theorems about algebras
Lemmas in algebra
Commutative algebra

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