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Talk:Fractional ideal

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I corrected the bare URL by replacing the bare URL with a reference to a textbook, Barucci, Valentina (2000). Also, the link provided by the bare URL was non-functioning. For more information see
632: 384: 140: 616: 310: 371: 247: 881: 562: 873: 844: 1083: 807:{\displaystyle {\begin{aligned}(n\zeta _{3}+1)^{2}&=2n\zeta _{3}^{2}+2n\zeta _{3}+1\\&=2n(\zeta _{3}^{2}+\zeta _{3})+1\\&=1-2n\end{aligned}}} 130: 1078: 106: 187:
Also, some sources: Mline's notes from his web page are pretty useful and informative. Then there's Neukirch's book "Algebraic Number Theory"
527:{\displaystyle {\begin{aligned}(2\zeta _{3}+1)^{2}&=4\zeta _{3}^{2}+4\zeta _{3}+1\\&=4(\zeta _{3}^{2}+\zeta _{3})+1\end{aligned}}} 255: 173: 97: 58: 33: 567: 279: 21: 315: 259: 177: 1037: 172:
Yes, most definitely: Can someone who is knowledgeable about the subject please include several examples.
39: 1033: 1025:{\displaystyle (n\zeta _{3}+1)^{2}=n^{2}\zeta _{3}^{2}+2n\zeta _{3}+1=n(n\zeta _{3}^{2}+2\zeta _{3})+1} 221: 83: 195: 105:
on Knowledge. If you would like to participate, please visit the project page, where you can join
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Someone wrote a section in TeX, not realizing that TeX doesn't quite work like that, here.
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I hope someone knowledgeable about fractional ideals can rewrite that sentence in English.
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An explicit example of a fractional ideal would be nice. (basically added) --
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The article currently reads (following an edit by Kaptain-k-theory):
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Surely the last part of this is complete nonsense – it should be
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giving a factorization of all ideal generated by an odd number
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Note that this factorization can be generalized by taking
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This is because if we multiply it out, we get 218:We call a fractional ideal which is a subset of 8: 611:{\displaystyle \zeta _{3}^{2}+\zeta _{3}=-1} 19: 47: 1007: 991: 986: 958: 939: 934: 924: 911: 895: 883: 851: 822: 762: 749: 744: 708: 689: 684: 661: 645: 631: 629: 593: 580: 575: 569: 548: 542: 505: 492: 487: 454: 438: 433: 413: 397: 383: 381: 357: 341: 317: 305:{\displaystyle \mathbb {Q} _{\zeta _{3}}} 294: 289: 285: 284: 281: 233: 227: 226: 223: 366:{\displaystyle (3)=(2\zeta _{3}+1)^{2}} 49: 7: 95:This article is within the scope of 209:The second sentence in the section 38:It is of interest to the following 242:{\displaystyle {\mathcal {O}}_{K}} 14: 1084:Mid-priority mathematics articles 618:, our factorization makes sense. 115:Knowledge:WikiProject Mathematics 1079:Start-Class mathematics articles 118:Template:WikiProject Mathematics 82: 72: 51: 20: 135:This article has been rated as 1013: 976: 908: 885: 768: 737: 658: 635: 511: 480: 410: 387: 354: 331: 325: 319: 1: 109:and see a list of open tasks. 1100: 1065:23:05, 15 March 2023 (UTC) 1042:18:54, 28 March 2022 (UTC) 557:{\displaystyle \zeta _{3}} 312:we have the factorization 200:19:23, 17 July 2009 (UTC) 134: 67: 46: 264:23:14, 24 May 2020 (UTC) 182:23:16, 24 May 2020 (UTC) 167:18:15, 4 July 2006 (UTC) 141:project's priority scale 98:WikiProject Mathematics 1026: 869: 840: 808: 612: 558: 528: 367: 306: 243: 28:This article is rated 1027: 870: 841: 809: 613: 559: 529: 368: 307: 244: 882: 868:{\displaystyle k=-n} 850: 839:{\displaystyle 1+2k} 821: 628: 568: 541: 380: 316: 280: 222: 121:mathematics articles 996: 944: 754: 694: 585: 497: 443: 1022: 982: 930: 865: 836: 804: 802: 740: 680: 608: 571: 554: 524: 522: 483: 429: 363: 302: 239: 90:Mathematics portal 34:content assessment 155: 154: 151: 150: 147: 146: 1091: 1031: 1029: 1028: 1023: 1012: 1011: 995: 990: 963: 962: 943: 938: 929: 928: 916: 915: 900: 899: 874: 872: 871: 866: 845: 843: 842: 837: 813: 811: 810: 805: 803: 767: 766: 753: 748: 713: 712: 693: 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35: 27: 23: 18: 17: 1050: 1034:Joel Brennan 877: 816: 620: 536: 275: 272: 253: 217: 215: 210: 208: 189: 186: 161: 137:Mid-priority 136: 96: 62:Mid‑priority 40:WikiProjects 1053:WP:BAREURLS 158:Suggestions 112:Mathematics 103:mathematics 59:Mathematics 30:Start-class 1073:Categories 564:satisfies 249:integral. 192:John Baez 1047:Bare URL 164:Rschwieb 139:on the 846:(with 537:Since 36:scale. 1057:TMM53 1061:talk 1038:talk 875:)." 276:"In 260:talk 196:talk 178:talk 1055:. 131:Mid 1075:: 1063:) 1040:) 1005:ζ 984:ζ 956:ζ 932:ζ 893:ζ 860:− 792:− 760:ζ 742:ζ 706:ζ 682:ζ 643:ζ 603:− 591:ζ 573:ζ 546:ζ 503:ζ 485:ζ 452:ζ 431:ζ 395:ζ 339:ζ 292:ζ 262:) 251:" 198:) 180:) 1059:( 1036:( 1020:1 1017:+ 1014:) 1009:3 1001:2 998:+ 993:2 988:3 980:n 977:( 974:n 971:= 968:1 965:+ 960:3 952:n 949:2 946:+ 941:2 936:3 926:2 922:n 918:= 913:2 909:) 905:1 902:+ 897:3 889:n 886:( 863:n 857:= 854:k 834:k 831:2 828:+ 825:1 798:n 795:2 789:1 786:= 775:1 772:+ 769:) 764:3 756:+ 751:2 746:3 738:( 735:n 732:2 729:= 718:1 715:+ 710:3 702:n 699:2 696:+ 691:2 686:3 678:n 675:2 672:= 663:2 659:) 655:1 652:+ 647:3 639:n 636:( 606:1 600:= 595:3 587:+ 582:2 577:3 550:3 518:1 515:+ 512:) 507:3 499:+ 494:2 489:3 481:( 478:4 475:= 464:1 461:+ 456:3 448:4 445:+ 440:2 435:3 427:4 424:= 415:2 411:) 407:1 404:+ 399:3 391:2 388:( 359:2 355:) 351:1 348:+ 343:3 335:2 332:( 329:= 326:) 323:3 320:( 296:3 286:Q 258:( 235:K 229:O 216:" 194:( 176:( 143:. 42::

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Rschwieb
18:15, 4 July 2006 (UTC)
50.205.142.50
talk
23:16, 24 May 2020 (UTC)
John Baez
talk
19:23, 17 July 2009 (UTC)
50.205.142.50
talk
23:14, 24 May 2020 (UTC)
Joel Brennan
talk
18:54, 28 March 2022 (UTC)
WP:BAREURLS
TMM53
talk

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