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Algebraic integer

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Any number constructible out of the integers with roots, addition, and multiplication is an algebraic integer; but not all algebraic integers are so constructible: in a naĂŻve sense, most roots of irreducible
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is an algebraic number then it can be written as the ratio of an algebraic integer to a non-zero algebraic integer. In fact, the denominator can always be chosen to be a positive integer. The ratio is
1600: 1352:{\displaystyle {\begin{cases}1,\alpha ,{\dfrac {\alpha ^{2}\pm k^{2}\alpha +k^{2}}{3k}}&m\equiv \pm 1{\bmod {9}}\\1,\alpha ,{\dfrac {\alpha ^{2}}{k}}&{\text{otherwise}}\end{cases}}} 869: 1104: 976: 1418: 2394: 2366: 339: 308: 616: 402: 1148: 664: 1920: 1898: 1853: 1831: 1802: 1776: 1754: 1547: 1456: 721: 695: 585: 551: 529: 486: 455: 267: 221: 191: 39: 1057: 908: 797: 2056:
Every root of a monic polynomial whose coefficients are algebraic integers is itself an algebraic integer. In other words, the algebraic integers form a ring that is
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The sum, difference and product of two algebraic integers is an algebraic integer. In general their quotient is not. Thus the algebraic integers form a
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The analogy is possible because both algebraic integers and algebraic numbers are defined as roots of monic polynomials over either
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The only algebraic integers that are found in the set of rational numbers are the integers. In other words, the intersection of
2521: 1708:{\displaystyle \mathbb {Z} (\alpha )\equiv \{\sum _{i=0}^{n}\alpha ^{i}z_{i}|z_{i}\in \mathbb {Z} ,n\in \mathbb {Z} \}} 2616: 1779: 2430: 2732: 2514: 2072: 832: 2495: 1062: 934: 872: 342: 132: 2090: 2057: 1385: 2371: 2343: 316: 276: 2101: 1369: 60: 593: 2108: 1926: 1524: 361: 2563: 2397: 1565: 2707: 636:
of a ring extension. In particular, an algebraic integer is an integral element of a finite extension
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If the monic polynomial associated with an algebraic integer has constant term 1 or −1, then the
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One may also construct explicitly the monic polynomial involved, which is generally of higher
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is finitely generated itself); the only required change is that only non-negative powers of
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is 1, which is weaker than requiring the coefficients to be pairwise relatively prime.
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is closed under addition, subtraction and multiplication and therefore is a
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is 1) whose coefficients are integers. The set of all algebraic integers
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Complex number that solves a monic polynomial with integer coefficients
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of that algebraic integer is also an algebraic integer, and each is a
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is an algebraic integer if there exists a non-zero finitely generated
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The following are equivalent definitions of an algebraic integer. Let
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The only rational algebraic integers are the integers. Thus, if
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This article is about the ring of complex numbers integral over
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is an algebraic integer if there exists a monic polynomial
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is also an algebraic integer. It satisfies the polynomial
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than those of the original algebraic integers, by taking
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is an integer. The full ring of integers is generated by
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that has integer coefficients but is not monic, and
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of rational numbers. The ring of algebraic integers
1782:replaced by finite generation (using the fact that 41:. For the general notion of algebraic integer, see 2388: 2360: 1914: 1892: 1847: 1825: 1796: 1770: 1748: 1707: 1541: 1450: 1412: 1351: 1142: 1098: 1051: 970: 902: 863: 791: 715: 689: 658: 610: 579: 545: 523: 480: 449: 396: 333: 302: 261: 215: 185: 33: 2488:Algebraic Number Theory: A Computational Approach 2253:is a monic polynomial with integer coefficients. 2200:is an algebraic integer because it is a root of 1480:is another algebraic integer. A polynomial for 143:: it can also be characterised as the maximal 2522: 910:since this is a root of the monic polynomial 864:{\displaystyle K=\mathbb {Q} ({\sqrt {d}}\,)} 79:. That is, an algebraic integer is a complex 8: 1702: 1621: 1099:{\textstyle {\frac {1}{2}}(1+{\sqrt {d}}\,)} 971:{\textstyle {\frac {1}{2}}(1+{\sqrt {d}}\,)} 755:. The leading coefficient of the polynomial 2529: 2515: 2507: 2382: 2381: 2373: 2354: 2353: 2345: 2048:generated by its two input polynomials.) 1908: 1907: 1905: 1886: 1885: 1883: 1841: 1840: 1838: 1819: 1818: 1816: 1790: 1789: 1787: 1764: 1763: 1761: 1742: 1741: 1739: 1698: 1697: 1684: 1683: 1674: 1665: 1659: 1649: 1639: 1628: 1605: 1604: 1602: 1535: 1534: 1532: 1439: 1428: 1427: 1425: 1401: 1390: 1389: 1387: 1337: 1323: 1316: 1294: 1290: 1258: 1242: 1229: 1221: 1201: 1199: 1127: 1126: 1118: 1092: 1085: 1066: 1064: 1042: 1040: 964: 957: 938: 936: 893: 891: 857: 850: 843: 842: 834: 782: 780: 709: 708: 706: 683: 682: 680: 652: 651: 646: 641: 632:Algebraic integers are a special case of 604: 603: 595: 573: 572: 570: 539: 538: 536: 508: 507: 505: 465: 464: 462: 443: 442: 440: 381: 380: 363: 327: 326: 318: 287: 286: 278: 255: 254: 252: 209: 208: 206: 170: 169: 167: 27: 26: 24: 1413:{\displaystyle \mathbb {Q} (\zeta _{n})} 2446: 2389:{\displaystyle \alpha \in \mathbb {Z} } 2361:{\displaystyle \alpha \in \mathbb {Q} } 334:{\displaystyle \theta \in \mathbb {C} } 303:{\displaystyle K=\mathbb {Q} (\theta )} 2501:from the original on November 2, 2013. 1726:The proof is analogous to that of the 611:{\displaystyle M\subset \mathbb {C} } 7: 2308:with integer coefficients and where 2157:with integer coefficients and where 2096:The ring of algebraic integers is a 1589:(in the sense that is equivalent to 397:{\displaystyle f(x)\in \mathbb {Z} } 2400:for the case of a monic polynomial. 1577:Finite generation of ring extension 1379:, then the ring of integers of the 745:is not an algebraic integer unless 2458:(3rd ed.). Berlin, New York: 2119:of the ring of algebraic integers. 1113:The ring of integers of the field 14: 2396:. This is a direct result of the 2063:Again, the proof is analogous to 1984:and the polynomials satisfied by 1870:This can be shown analogously to 2706: 803:is an algebraic integer, but is 2142:is an algebraic integer, where 1933:and factoring. For example, if 427:is an algebraic integer if the 2322:is the highest-degree term of 2171:is the highest-degree term of 1666: 1615: 1609: 1564:is used in the sense that the 1445: 1432: 1407: 1394: 1143:{\displaystyle F=\mathbb {Q} } 1137: 1131: 1093: 1076: 965: 948: 858: 847: 659:{\displaystyle K/\mathbb {Q} } 518: 512: 475: 469: 391: 385: 374: 368: 297: 291: 180: 174: 1: 2340:is an algebraic integers and 1465:is an algebraic integer then 2128:is an algebraic number then 1915:{\displaystyle \mathbb {Q} } 1893:{\displaystyle \mathbb {Z} } 1848:{\displaystyle \mathbb {Q} } 1826:{\displaystyle \mathbb {Z} } 1808:are involved in the proof. 1797:{\displaystyle \mathbb {Z} } 1771:{\displaystyle \mathbb {Z} } 1749:{\displaystyle \mathbb {Q} } 1553:are algebraic integers (but 1549:, then none of the roots of 1542:{\displaystyle \mathbb {Q} } 1484:is obtained by substituting 1451:{\displaystyle \mathbb {Z} } 716:{\displaystyle \mathbb {Z} } 690:{\displaystyle \mathbb {Q} } 580:{\displaystyle \mathbb {Z} } 546:{\displaystyle \mathbb {Z} } 524:{\displaystyle \mathbb {Z} } 481:{\displaystyle \mathbb {Z} } 450:{\displaystyle \mathbb {Q} } 262:{\displaystyle \mathbb {Q} } 216:{\displaystyle \mathbb {Z} } 186:{\displaystyle \mathbb {Z} } 34:{\displaystyle \mathbb {Z} } 2617:Quadratic irrational number 2603:Pisot–Vijayaraghavan number 2462:. ch. 2, p. 38 and ex. 41. 1052:{\displaystyle {\sqrt {d}}} 903:{\displaystyle {\sqrt {d}}} 792:{\displaystyle {\sqrt {n}}} 500:is an algebraic integer if 2754: 2454:Marcus, Daniel A. (1977). 2100:, as a consequence of the 2060:in any of its extensions. 1992:using the resultant gives 47: 18: 2702: 2544: 1900:instead of the rationals 1723:is an algebraic integer. 799:of a nonnegative integer 343:primitive element theorem 2431:Dirichlet's unit theorem 1778:here, and the notion of 531:is a finitely generated 201:, which is to say, as a 158:is an algebraic integer 106:of the complex numbers. 48:Not to be confused with 2297:satisfies a polynomial 2146:satisfies a polynomial 2102:principal ideal theorem 2065:the corresponding proof 1872:the corresponding proof 1568:of the coefficients of 61:algebraic number theory 2713:Mathematics portal 2390: 2362: 1916: 1894: 1849: 1827: 1798: 1780:field extension degree 1772: 1750: 1709: 1644: 1543: 1490:in the polynomial for 1452: 1414: 1353: 1144: 1100: 1053: 972: 904: 865: 793: 723:. The rational number 717: 691: 660: 612: 581: 547: 525: 482: 451: 398: 335: 304: 263: 217: 187: 35: 2398:rational root theorem 2391: 2363: 2089:are not. This is the 1917: 1895: 1878:, using the integers 1850: 1828: 1799: 1773: 1751: 1710: 1624: 1593:) of the integers by 1566:highest common factor 1544: 1453: 1415: 1354: 1145: 1101: 1054: 973: 905: 866: 794: 718: 692: 661: 613: 582: 548: 526: 483: 452: 399: 336: 305: 264: 218: 188: 36: 2559:Constructible number 2372: 2344: 2115:, an element of the 2091:Abel–Ruffini theorem 2073:algebraically closed 1904: 1882: 1837: 1815: 1786: 1760: 1738: 1601: 1531: 1517:primitive polynomial 1424: 1386: 1198: 1165:, has the following 1117: 1063: 1039: 935: 890: 833: 779: 705: 679: 640: 594: 569: 535: 504: 461: 439: 431:monic polynomial of 362: 317: 277: 251: 205: 166: 23: 2685:Supersilver ratio ( 2676:Supergolden ratio ( 1965:, then eliminating 931:, then the element 824:square-free integer 273:), in other words, 93:leading coefficient 2579:Eisenstein integer 2421:Eisenstein integer 2386: 2358: 1912: 1890: 1845: 1823: 1794: 1768: 1756:there replaced by 1746: 1728:corresponding fact 1717:finitely generated 1705: 1539: 1448: 1410: 1349: 1344: 1333: 1274: 1140: 1106:respectively. See 1096: 1049: 968: 900: 861: 789: 713: 687: 656: 608: 577: 543: 521: 478: 447: 394: 331: 300: 259: 213: 195:finitely generated 183: 31: 2733:Algebraic numbers 2720: 2719: 2694:Twelfth root of 2 2574:Doubling the cube 2564:Conway's constant 2549:Algebraic integer 2538:Algebraic numbers 2469:978-0-387-90279-1 2436:Fundamental units 2069:algebraic numbers 2058:integrally closed 2019:is a root of the 1876:algebraic numbers 1732:algebraic numbers 1558:algebraic numbers 1340: 1332: 1273: 1108:Quadratic integer 1090: 1074: 1047: 962: 946: 898: 855: 787: 634:integral elements 65:algebraic integer 50:algebraic element 2745: 2711: 2710: 2688: 2679: 2671:Square root of 7 2666:Square root of 6 2661:Square root of 5 2656:Square root of 3 2651:Square root of 2 2644: 2640: 2611: 2592: 2584:Gaussian integer 2569:Cyclotomic field 2531: 2524: 2517: 2508: 2502: 2500: 2493: 2474: 2473: 2451: 2416:Gaussian integer 2411:Integral element 2395: 2393: 2392: 2387: 2385: 2367: 2365: 2364: 2359: 2357: 2339: 2332: 2321: 2307: 2296: 2292: 2290: 2275: 2261: 2252: 2241: 2222: 2221: 2199: 2181: 2170: 2156: 2145: 2141: 2127: 2079:Additional facts 2052:Integral closure 2043: 2032: 2022: 2018: 2014: 1991: 1987: 1983: 1972: 1968: 1964: 1954: 1943: 1921: 1919: 1918: 1913: 1911: 1899: 1897: 1896: 1891: 1889: 1855:, respectively. 1854: 1852: 1851: 1846: 1844: 1832: 1830: 1829: 1824: 1822: 1807: 1803: 1801: 1800: 1795: 1793: 1777: 1775: 1774: 1769: 1767: 1755: 1753: 1752: 1747: 1745: 1722: 1714: 1712: 1711: 1706: 1701: 1687: 1679: 1678: 1669: 1664: 1663: 1654: 1653: 1643: 1638: 1608: 1596: 1584: 1571: 1552: 1548: 1546: 1545: 1540: 1538: 1522: 1514: 1493: 1489: 1483: 1479: 1478: 1477: 1464: 1457: 1455: 1454: 1449: 1444: 1443: 1431: 1419: 1417: 1416: 1411: 1406: 1405: 1393: 1381:cyclotomic field 1374: 1367: 1358: 1356: 1355: 1350: 1348: 1347: 1341: 1338: 1334: 1328: 1327: 1318: 1299: 1298: 1275: 1272: 1264: 1263: 1262: 1247: 1246: 1234: 1233: 1223: 1193: 1189: 1178: 1164: 1163: 1162: 1149: 1147: 1146: 1141: 1130: 1105: 1103: 1102: 1097: 1091: 1086: 1075: 1067: 1058: 1056: 1055: 1050: 1048: 1043: 1034: 1028: 1026: 1025: 1022: 1019: 1008: 1002: 1000: 999: 996: 993: 977: 975: 974: 969: 963: 958: 947: 939: 930: 919: 909: 907: 906: 901: 899: 894: 885: 879: 870: 868: 867: 862: 856: 851: 846: 821: 810: 802: 798: 796: 795: 790: 788: 783: 768: 764: 754: 748: 744: 743: 741: 740: 735: 732: 722: 720: 719: 714: 712: 700: 696: 694: 693: 688: 686: 665: 663: 662: 657: 655: 650: 627: 617: 615: 614: 609: 607: 586: 584: 583: 578: 576: 564: 552: 550: 549: 544: 542: 530: 528: 527: 522: 511: 499: 487: 485: 484: 479: 468: 456: 454: 453: 448: 446: 434: 426: 414: 403: 401: 400: 395: 384: 357: 340: 338: 337: 332: 330: 312:algebraic number 309: 307: 306: 301: 290: 271:rational numbers 268: 266: 265: 260: 258: 245:finite extension 238: 222: 220: 219: 214: 212: 192: 190: 189: 184: 173: 157: 153: 142: 138: 130: 124: 119: 111:ring of integers 98: 85:monic polynomial 54:algebraic number 40: 38: 37: 32: 30: 2753: 2752: 2748: 2747: 2746: 2744: 2743: 2742: 2723: 2722: 2721: 2716: 2705: 2698: 2686: 2677: 2645: 2642: 2638: 2622:Rational number 2609: 2608:Plastic ratio ( 2590: 2554:Chebyshev nodes 2540: 2535: 2505: 2498: 2491: 2481: 2477: 2470: 2460:Springer-Verlag 2453: 2452: 2448: 2444: 2407: 2370: 2369: 2342: 2341: 2337: 2323: 2317: 2309: 2298: 2294: 2289: 2281: 2274: 2266: 2264: 2257: 2243: 2239: 2220: 2215: 2214: 2213: 2201: 2195: 2183: 2172: 2166: 2158: 2147: 2143: 2137: 2129: 2123: 2081: 2054: 2034: 2024: 2020: 2016: 1993: 1989: 1985: 1974: 1970: 1966: 1956: 1945: 1934: 1902: 1901: 1880: 1879: 1861: 1835: 1834: 1813: 1812: 1805: 1784: 1783: 1758: 1757: 1736: 1735: 1720: 1719:if and only if 1670: 1655: 1645: 1599: 1598: 1594: 1591:field extension 1582: 1579: 1569: 1550: 1529: 1528: 1520: 1505: 1501: 1491: 1485: 1481: 1473: 1471: 1466: 1462: 1435: 1422: 1421: 1397: 1384: 1383: 1372: 1366: 1362: 1343: 1342: 1335: 1319: 1301: 1300: 1276: 1265: 1254: 1238: 1225: 1224: 1202: 1196: 1195: 1191: 1187: 1170: 1158: 1156: 1151: 1115: 1114: 1061: 1060: 1037: 1036: 1023: 1020: 1017: 1016: 1014: 1013: 997: 994: 991: 990: 988: 979: 933: 932: 921: 920:. Moreover, if 911: 888: 887: 884: 877: 876: 873:quadratic field 831: 830: 819: 808: 800: 777: 776: 766: 765:is the integer 756: 752: 746: 736: 733: 728: 727: 725: 724: 703: 702: 698: 677: 676: 672: 638: 637: 619: 592: 591: 567: 566: 556: 533: 532: 502: 501: 491: 459: 458: 437: 436: 432: 418: 405: 360: 359: 349: 315: 314: 275: 274: 269:, the field of 249: 248: 236: 233: 203: 202: 164: 163: 155: 151: 140: 136: 129: 122: 121: 117: 96: 57: 46: 21: 20: 17: 12: 11: 5: 2751: 2749: 2741: 2740: 2735: 2725: 2724: 2718: 2717: 2703: 2700: 2699: 2697: 2696: 2691: 2682: 2673: 2668: 2663: 2658: 2653: 2648: 2641: 2637:Silver ratio ( 2634: 2629: 2624: 2619: 2614: 2605: 2600: 2595: 2589:Golden ratio ( 2586: 2581: 2576: 2571: 2566: 2561: 2556: 2551: 2545: 2542: 2541: 2536: 2534: 2533: 2526: 2519: 2511: 2504: 2503: 2483:Stein, William 2478: 2476: 2475: 2468: 2445: 2443: 2440: 2439: 2438: 2433: 2428: 2423: 2418: 2413: 2406: 2403: 2402: 2401: 2384: 2380: 2377: 2356: 2352: 2349: 2334: 2313: 2285: 2270: 2254: 2235: 2216: 2191: 2162: 2133: 2120: 2117:group of units 2105: 2094: 2080: 2077: 2053: 2050: 2023:-resultant of 1910: 1888: 1860: 1857: 1843: 1821: 1792: 1766: 1744: 1704: 1700: 1696: 1693: 1690: 1686: 1682: 1677: 1673: 1668: 1662: 1658: 1652: 1648: 1642: 1637: 1634: 1631: 1627: 1623: 1620: 1617: 1614: 1611: 1607: 1587:ring extension 1578: 1575: 1574: 1573: 1537: 1500: 1497: 1496: 1495: 1459: 1447: 1442: 1438: 1434: 1430: 1409: 1404: 1400: 1396: 1392: 1364: 1359: 1346: 1336: 1331: 1326: 1322: 1315: 1312: 1309: 1306: 1303: 1302: 1297: 1293: 1289: 1286: 1283: 1280: 1277: 1271: 1268: 1261: 1257: 1253: 1250: 1245: 1241: 1237: 1232: 1228: 1220: 1217: 1214: 1211: 1208: 1207: 1205: 1167:integral basis 1139: 1136: 1133: 1129: 1125: 1122: 1111: 1095: 1089: 1084: 1081: 1078: 1073: 1070: 1046: 967: 961: 956: 953: 950: 945: 942: 897: 880: 860: 854: 849: 845: 841: 838: 816: 813:perfect square 786: 770: 711: 685: 671: 668: 654: 649: 645: 630: 629: 606: 602: 599: 575: 554: 541: 520: 517: 514: 510: 489: 477: 474: 471: 467: 445: 416: 393: 390: 387: 383: 379: 376: 373: 370: 367: 329: 325: 322: 299: 296: 293: 289: 285: 282: 257: 232: 229: 211: 182: 179: 176: 172: 160:if and only if 125: 69:complex number 29: 15: 13: 10: 9: 6: 4: 3: 2: 2750: 2739: 2736: 2734: 2731: 2730: 2728: 2715: 2714: 2709: 2701: 2695: 2692: 2690: 2683: 2681: 2674: 2672: 2669: 2667: 2664: 2662: 2659: 2657: 2654: 2652: 2649: 2647: 2635: 2633: 2630: 2628: 2627:Root of unity 2625: 2623: 2620: 2618: 2615: 2613: 2606: 2604: 2601: 2599: 2598:Perron number 2596: 2594: 2587: 2585: 2582: 2580: 2577: 2575: 2572: 2570: 2567: 2565: 2562: 2560: 2557: 2555: 2552: 2550: 2547: 2546: 2543: 2539: 2532: 2527: 2525: 2520: 2518: 2513: 2512: 2509: 2497: 2490: 2489: 2484: 2480: 2479: 2471: 2465: 2461: 2457: 2456:Number Fields 2450: 2447: 2441: 2437: 2434: 2432: 2429: 2427: 2426:Root of unity 2424: 2422: 2419: 2417: 2414: 2412: 2409: 2408: 2404: 2399: 2378: 2375: 2350: 2347: 2335: 2330: 2326: 2320: 2316: 2312: 2305: 2301: 2288: 2284: 2279: 2273: 2269: 2260: 2255: 2250: 2246: 2238: 2234: 2230: 2226: 2219: 2212: 2208: 2204: 2198: 2194: 2190: 2186: 2182:. The value 2179: 2175: 2169: 2165: 2161: 2154: 2150: 2140: 2136: 2132: 2126: 2121: 2118: 2114: 2110: 2106: 2103: 2099: 2098:BĂ©zout domain 2095: 2092: 2088: 2083: 2082: 2078: 2076: 2074: 2070: 2066: 2061: 2059: 2051: 2049: 2047: 2041: 2037: 2031: 2027: 2012: 2008: 2004: 2000: 1996: 1981: 1977: 1963: 1959: 1952: 1948: 1941: 1937: 1932: 1928: 1923: 1877: 1873: 1868: 1866: 1858: 1856: 1809: 1781: 1733: 1729: 1724: 1718: 1694: 1691: 1688: 1680: 1675: 1671: 1660: 1656: 1650: 1646: 1640: 1635: 1632: 1629: 1625: 1618: 1612: 1597:, denoted by 1592: 1588: 1576: 1567: 1563: 1559: 1556: 1526: 1518: 1512: 1508: 1503: 1502: 1498: 1488: 1476: 1469: 1460: 1440: 1436: 1420:is precisely 1402: 1398: 1382: 1378: 1377:root of unity 1371: 1360: 1329: 1324: 1320: 1313: 1310: 1307: 1304: 1295: 1287: 1284: 1281: 1278: 1269: 1266: 1259: 1255: 1251: 1248: 1243: 1239: 1235: 1230: 1226: 1218: 1215: 1212: 1209: 1203: 1185: 1182: 1177: 1173: 1168: 1161: 1154: 1134: 1123: 1120: 1112: 1109: 1087: 1082: 1079: 1071: 1068: 1044: 1032: 1012: 1011:constant term 1006: 986: 982: 959: 954: 951: 943: 940: 928: 924: 918: 914: 895: 883: 874: 852: 839: 836: 829: 825: 817: 814: 806: 784: 775: 771: 763: 759: 751: 739: 731: 674: 673: 669: 667: 647: 643: 635: 626: 622: 600: 597: 590: 563: 559: 555: 515: 498: 494: 490: 472: 430: 425: 421: 417: 412: 408: 388: 377: 371: 365: 356: 352: 348: 347: 346: 344: 323: 320: 313: 294: 283: 280: 272: 246: 242: 230: 228: 226: 200: 199:abelian group 196: 177: 161: 150: 146: 134: 128: 120:, denoted by 116: 112: 107: 105: 102: 94: 90: 86: 82: 78: 74: 70: 66: 62: 55: 51: 44: 2704: 2632:Salem number 2548: 2487: 2455: 2449: 2328: 2324: 2318: 2314: 2310: 2303: 2299: 2286: 2282: 2277: 2271: 2267: 2258: 2248: 2244: 2236: 2232: 2228: 2224: 2217: 2210: 2206: 2202: 2196: 2192: 2188: 2184: 2177: 2173: 2167: 2163: 2159: 2152: 2148: 2138: 2134: 2130: 2124: 2062: 2055: 2039: 2035: 2029: 2025: 2010: 2006: 2002: 1998: 1994: 1979: 1975: 1961: 1957: 1950: 1946: 1939: 1935: 1924: 1869: 1862: 1810: 1725: 1580: 1561: 1554: 1510: 1506: 1486: 1474: 1467: 1175: 1171: 1159: 1152: 1030: 1004: 984: 980: 922: 916: 912: 881: 761: 757: 737: 729: 631: 624: 620: 561: 557: 496: 492: 423: 419: 410: 406: 354: 350: 241:number field 234: 133:intersection 126: 115:number field 108: 64: 58: 1525:irreducible 1499:Non-example 1181:square-free 774:square root 701:is exactly 231:Definitions 101:commutative 43:Integrality 2727:Categories 2442:References 2109:reciprocal 1931:resultants 1730:regarding 1169:, writing 1009:where the 805:irrational 618:such that 404:such that 89:polynomial 2379:∈ 2376:α 2351:∈ 2348:α 1695:∈ 1681:∈ 1647:α 1626:∑ 1619:≡ 1613:α 1562:primitive 1437:ζ 1399:ζ 1370:primitive 1339:otherwise 1321:α 1311:α 1285:± 1282:≡ 1249:α 1236:± 1227:α 1216:α 1186:integers 1135:α 1110:for more. 886:contains 828:extension 826:then the 601:⊂ 589:submodule 516:α 378:∈ 324:∈ 321:θ 310:for some 295:θ 243:(i.e., a 178:α 162:the ring 131:, is the 75:over the 2738:Integers 2496:Archived 2405:See also 2293:, where 2280:/ | 2242:, where 2231: / 2087:quintics 1581:For any 1560:). Here 1179:for two 670:Examples 553:-module. 83:of some 77:integers 73:integral 71:that is 2368:, then 2223:  2013:− 1 = 0 1953:− 1 = 0 1942:− 1 = 0 1734:, with 1472:√ 1184:coprime 1157:√ 1027:⁠ 1015:⁠ 1001:⁠ 989:⁠ 807:unless 750:divides 742:⁠ 726:⁠ 429:minimal 341:by the 147:of the 104:subring 2466:  2338:α 2291:| 2276:| 2265:| 2071:being 1927:degree 1806:α 1721:α 1595:α 1585:, the 1583:α 457:is in 225:module 197:as an 91:whose 2499:(PDF) 2492:(PDF) 2046:ideal 1973:from 1715:, is 1527:over 1515:is a 1368:is a 1029:(1 − 1003:(1 − 871:is a 822:is a 811:is a 435:over 413:) = 0 239:be a 149:field 145:order 113:of a 67:is a 63:, an 2464:ISBN 2209:) = 2113:unit 2067:for 2033:and 1988:and 1969:and 1955:and 1874:for 1865:ring 1859:Ring 1190:and 925:≡ 1 772:The 697:and 139:and 109:The 81:root 2256:If 2122:If 2042:− 1 2001:− 4 1997:− 3 1982:= 0 1833:or 1555:are 1523:is 1504:If 1461:If 1375:th 1361:If 1292:mod 1059:or 927:mod 818:If 247:of 193:is 135:of 87:(a 59:In 52:or 2729:: 2494:. 2485:. 2187:= 2075:. 2038:− 2030:xy 2028:− 2017:xy 2009:+ 2005:+ 1980:xy 1978:− 1962:xy 1960:= 1949:− 1944:, 1938:− 1922:. 1867:. 1470:= 1194:: 1176:hk 1174:= 1155:= 1150:, 987:+ 983:− 915:− 760:− 758:bx 666:. 623:⊆ 621:αM 560:∈ 495:∈ 422:∈ 353:∈ 345:. 227:. 2689:) 2687:ς 2680:) 2678:ψ 2646:) 2643:S 2639:ÎŽ 2612:) 2610:ρ 2593:) 2591:φ 2530:e 2523:t 2516:v 2472:. 2383:Z 2355:Q 2333:. 2331:) 2329:x 2327:( 2325:p 2319:x 2315:n 2311:a 2306:) 2304:x 2302:( 2300:p 2295:x 2287:n 2283:a 2278:x 2272:n 2268:a 2259:x 2251:) 2249:y 2247:( 2245:q 2240:) 2237:n 2233:a 2229:y 2227:( 2225:p 2218:n 2211:a 2207:y 2205:( 2203:q 2197:x 2193:n 2189:a 2185:y 2180:) 2178:x 2176:( 2174:p 2168:x 2164:n 2160:a 2155:) 2153:x 2151:( 2149:p 2144:x 2139:x 2135:n 2131:a 2125:x 2104:. 2093:. 2040:x 2036:x 2026:z 2021:x 2011:z 2007:z 2003:z 1999:z 1995:z 1990:y 1986:x 1976:z 1971:y 1967:x 1958:z 1951:y 1947:y 1940:x 1936:x 1909:Q 1887:Z 1842:Q 1820:Z 1791:Z 1765:Z 1743:Q 1703:} 1699:Z 1692:n 1689:, 1685:Z 1676:i 1672:z 1667:| 1661:i 1657:z 1651:i 1641:n 1636:0 1633:= 1630:i 1622:{ 1616:) 1610:( 1606:Z 1570:P 1551:P 1536:Q 1521:P 1513:) 1511:x 1509:( 1507:P 1494:. 1492:α 1487:x 1482:ÎČ 1475:α 1468:ÎČ 1463:α 1458:. 1446:] 1441:n 1433:[ 1429:Z 1408:) 1403:n 1395:( 1391:Q 1373:n 1365:n 1363:ζ 1330:k 1325:2 1314:, 1308:, 1305:1 1296:9 1288:1 1279:m 1270:k 1267:3 1260:2 1256:k 1252:+ 1244:2 1240:k 1231:2 1219:, 1213:, 1210:1 1204:{ 1192:k 1188:h 1172:m 1160:m 1153:α 1138:] 1132:[ 1128:Q 1124:= 1121:F 1094:) 1088:d 1083:+ 1080:1 1077:( 1072:2 1069:1 1045:d 1033:) 1031:d 1024:4 1021:/ 1018:1 1007:) 1005:d 998:4 995:/ 992:1 985:x 981:x 966:) 960:d 955:+ 952:1 949:( 944:2 941:1 929:4 923:d 917:d 913:x 896:d 882:K 878:O 859:) 853:d 848:( 844:Q 840:= 837:K 820:d 815:. 809:n 801:n 785:n 769:. 767:b 762:a 753:a 747:b 738:b 734:/ 730:a 710:Z 699:A 684:Q 653:Q 648:/ 644:K 628:. 625:M 605:C 598:M 587:- 574:Z 562:K 558:α 540:Z 519:] 513:[ 509:Z 497:K 493:α 488:. 476:] 473:x 470:[ 466:Z 444:Q 433:α 424:K 420:α 415:. 411:α 409:( 407:f 392:] 389:x 386:[ 382:Z 375:) 372:x 369:( 366:f 355:K 351:α 328:C 298:) 292:( 288:Q 284:= 281:K 256:Q 237:K 223:- 210:Z 181:] 175:[ 171:Z 156:α 152:K 141:A 137:K 127:K 123:O 118:K 97:A 56:. 45:. 28:Z

Index

Integrality
algebraic element
algebraic number
algebraic number theory
complex number
integral
integers
root
monic polynomial
polynomial
leading coefficient
commutative
subring
ring of integers
number field
intersection
order
field
if and only if
finitely generated
abelian group
module
number field
finite extension
rational numbers
algebraic number
primitive element theorem
minimal
submodule
integral elements

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