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Polar space

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268: 2152:
proved that a finite polar space of rank at least three is always isomorphic with one of the three types of classical polar space given above. This leaves open only the problem of classifying the finite generalized quadrangles.
2137: 2164: 1721: 1457: 1254: 1916: 1510: 2077: 1667: 1098: 1301: 1863: 1048: 818: 508: 760: 2006: 1596: 1175: 983: 347:. One recovers the former definition from the latter under the assumptions that lines have more than 2 points, points lie on more than 2 lines, and there exist a line 1798: 1378: 724: 618: 459: 1951: 1756: 1336: 892: 1541: 1127: 935: 858: 838: 686: 666: 638: 580: 560: 528: 479: 413: 389: 365: 345: 321: 297: 2174: 538:
on the underlying vector space. The elements of the finite classical polar space associated with this form are the elements of the
644:
of the form is equal to the largest vector space dimension of the subspace contained in the polar space, and it is called the
204:
It is possible to define and study a slightly bigger class of objects using only the relationship between points and lines: a
2217: 2255: 2083: 1673: 1384: 1181: 1869: 1463: 2250: 2012: 1602: 1054: 1260: 1804: 989: 539: 765: 910: 2229:, QMW Maths Notes, vol. 13, London: Queen Mary and Westfield College School of Mathematical Sciences, 276: 648:
of the polar space. These finite classical polar spaces can be summarised by the following table, where
484: 209: 729: 1960: 1550: 1136: 944: 2170: 641: 531: 2221: 2187: 1765: 1345: 691: 585: 426: 73: 2234: 2210: 2230: 2206: 1927: 1732: 1312: 2205:, A Series of Modern Surveys in Mathematics, part 3, vol. 57, Heidelberg: Springer, 871: 1523: 1109: 917: 1516: 843: 823: 671: 651: 623: 565: 545: 535: 513: 464: 398: 374: 350: 330: 306: 282: 2244: 256: 103: 2200: 2149: 107: 20: 69: 56:, conventionally called the set of points, together with certain subsets of 271:
Generalized quadrangle with three points per line; a polar space of rank 2
2169:, London Mathematical Society Student Texts, Cambridge University Press, 24: 279:; in this case, in the latter definition, the set of points of a line 267: 2189:
Prehistory and History of Polar Spaces and of Generalized Polygons
266: 562:
is a sesquilinear form) or the totally singular subspaces (when
2202:
Diagram Geometry: Related to classical groups and buildings
110:
projective geometry.) For each subspace the corresponding
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is the rank of the polar space. The number of points in a
668:
is the dimension of the underlying projective space and
193:
There are at least two disjoint subspaces of dimension
117:
The intersection of two subspaces is always a subspace.
2086: 2015: 1963: 1930: 1872: 1807: 1768: 1735: 1676: 1605: 1553: 1526: 1466: 1387: 1348: 1315: 1263: 1184: 1139: 1112: 1057: 992: 947: 920: 874: 846: 826: 768: 732: 694: 674: 654: 626: 588: 568: 548: 516: 487: 467: 429: 401: 377: 353: 333: 309: 285: 2131: 2071: 2000: 1945: 1910: 1857: 1792: 1750: 1715: 1661: 1590: 1535: 1504: 1451: 1372: 1330: 1295: 1248: 1169: 1121: 1092: 1042: 977: 929: 886: 852: 832: 812: 754: 718: 680: 660: 632: 612: 574: 554: 522: 502: 473: 453: 407: 383: 359: 339: 315: 291: 186:that are in a common subspace of dimension 1 with 2132:{\displaystyle \mathrm {P\Gamma O^{-}} (2r+2,q)} 2166:Finite Geometry and Combinatorial Applications 1716:{\displaystyle \mathrm {P\Gamma O^{+}} (2r,q)} 2199:Buekenhout, Francis; Cohen, Arjeh M. (2013), 1452:{\displaystyle (q^{r+1/2}+1)\theta _{r-1}(q)} 1249:{\displaystyle (q^{r-1/2}+1)\theta _{r-1}(q)} 8: 1911:{\displaystyle \mathrm {P\Gamma O} (2r+1,q)} 1505:{\displaystyle \mathrm {P\Gamma U(2r+1,q)} } 2072:{\displaystyle (q^{r+1}+1)\theta _{r-1}(q)} 1662:{\displaystyle (q^{r-1}+1)\theta _{r-1}(q)} 1093:{\displaystyle \mathrm {P\Gamma Sp} (2r,q)} 1296:{\displaystyle \mathrm {P\Gamma U(2r,q)} } 2098: 2087: 2085: 2048: 2023: 2014: 1968: 1962: 1929: 1873: 1871: 1858:{\displaystyle (q^{r}+1)\theta _{r-1}(q)} 1834: 1815: 1806: 1767: 1734: 1688: 1677: 1675: 1638: 1613: 1604: 1558: 1552: 1525: 1467: 1465: 1428: 1405: 1395: 1386: 1347: 1314: 1264: 1262: 1225: 1202: 1192: 1183: 1138: 1111: 1058: 1056: 1043:{\displaystyle (q^{r}+1)\theta _{r-1}(q)} 1019: 1000: 991: 946: 919: 873: 845: 825: 786: 773: 767: 737: 731: 693: 673: 653: 625: 587: 567: 547: 515: 494: 490: 489: 486: 466: 428: 400: 376: 352: 332: 308: 284: 862: 813:{\displaystyle q^{k}+q^{k-1}+\cdots +1} 461:be the projective space of dimension 255:is a finite set) are also studied as 7: 860:, we get a generalized quadrangle. 395:is collinear to all points of  244:is either a singleton or the whole 2095: 2091: 2088: 1880: 1877: 1874: 1685: 1681: 1678: 1495: 1483: 1474: 1471: 1468: 1286: 1280: 1271: 1268: 1265: 1068: 1065: 1062: 1059: 14: 503:{\displaystyle \mathbb {F} _{q}} 275:A polar space of rank two is a 2126: 2105: 2066: 2060: 2041: 2016: 1995: 1974: 1905: 1884: 1852: 1846: 1827: 1808: 1787: 1772: 1710: 1695: 1656: 1650: 1631: 1606: 1585: 1564: 1498: 1477: 1446: 1440: 1421: 1388: 1367: 1352: 1289: 1274: 1243: 1237: 1218: 1185: 1164: 1143: 1087: 1072: 1037: 1031: 1012: 993: 972: 951: 755:{\displaystyle \theta _{k}(q)} 749: 743: 713: 701: 607: 595: 448: 436: 1: 2001:{\displaystyle Q^{-}(2r+1,q)} 1591:{\displaystyle Q^{+}(2r-1,q)} 419:Finite classical polar spaces 172:-dimensional. The points in 139:, there is a unique subspace 64:, that satisfy these axioms: 2186:Buekenhout, Francis (2000), 2223:Projective and polar spaces 540:totally isotropic subspaces 251:Finite polar spaces (where 2272: 220:), so that for each point 182:are exactly the points of 1170:{\displaystyle H(2r-1,q)} 978:{\displaystyle W(2r-1,q)} 582:is a quadratic form) of 114:is called its dimension. 1793:{\displaystyle Q(2r,q)} 1373:{\displaystyle H(2r,q)} 719:{\displaystyle PG(k,q)} 613:{\displaystyle PG(n,q)} 454:{\displaystyle PG(n,q)} 299:collinear with a point 263:Generalized quadrangles 236:, the set of points of 2133: 2073: 2002: 1947: 1912: 1859: 1794: 1752: 1717: 1663: 1592: 1537: 1506: 1453: 1374: 1332: 1297: 1250: 1171: 1123: 1094: 1044: 979: 931: 888: 854: 834: 814: 756: 720: 682: 662: 634: 614: 576: 556: 524: 504: 481:over the finite field 475: 455: 409: 385: 361: 341: 317: 293: 277:generalized quadrangle 272: 2163:Ball, Simeon (2015), 2134: 2074: 2003: 1948: 1913: 1860: 1795: 1753: 1718: 1664: 1593: 1538: 1507: 1454: 1375: 1333: 1298: 1251: 1172: 1124: 1095: 1045: 980: 932: 889: 855: 835: 815: 757: 721: 683: 663: 635: 615: 577: 557: 525: 505: 476: 456: 410: 386: 362: 342: 318: 294: 270: 257:combinatorial objects 106:. (That is, it is a 2084: 2013: 1961: 1946:{\displaystyle 2r+2} 1928: 1870: 1805: 1766: 1751:{\displaystyle 2r+1} 1733: 1674: 1603: 1551: 1524: 1464: 1385: 1346: 1331:{\displaystyle 2r+1} 1313: 1261: 1182: 1137: 1110: 1055: 990: 945: 918: 872: 844: 824: 766: 730: 692: 672: 652: 624: 586: 566: 546: 514: 485: 465: 427: 399: 375: 351: 331: 307: 283: 210:partial linear space 52:, consists of a set 2256:Projective geometry 905:Collineation group 887:{\displaystyle n+1} 762:and it is equal to 16:Concept in geometry 2129: 2069: 1998: 1943: 1908: 1855: 1790: 1748: 1713: 1659: 1588: 1536:{\displaystyle 2r} 1533: 1502: 1449: 1370: 1328: 1293: 1246: 1167: 1122:{\displaystyle 2r} 1119: 1090: 1040: 975: 930:{\displaystyle 2r} 927: 884: 850: 830: 810: 752: 716: 678: 658: 630: 610: 572: 552: 520: 500: 471: 451: 405: 381: 357: 337: 313: 289: 273: 120:For each subspace 68:Every subspace is 23:, in the field of 2218:Cameron, Peter J. 2142: 2141: 902:Number of points 853:{\displaystyle 2} 833:{\displaystyle r} 681:{\displaystyle r} 661:{\displaystyle n} 633:{\displaystyle f} 575:{\displaystyle f} 555:{\displaystyle f} 532:sesquilinear form 523:{\displaystyle f} 474:{\displaystyle n} 408:{\displaystyle l} 384:{\displaystyle l} 360:{\displaystyle l} 340:{\displaystyle l} 316:{\displaystyle l} 292:{\displaystyle l} 2263: 2251:Families of sets 2237: 2228: 2213: 2195: 2194: 2179: 2138: 2136: 2135: 2130: 2104: 2103: 2102: 2078: 2076: 2075: 2070: 2059: 2058: 2034: 2033: 2007: 2005: 2004: 1999: 1973: 1972: 1952: 1950: 1949: 1944: 1917: 1915: 1914: 1909: 1883: 1864: 1862: 1861: 1856: 1845: 1844: 1820: 1819: 1799: 1797: 1796: 1791: 1757: 1755: 1754: 1749: 1722: 1720: 1719: 1714: 1694: 1693: 1692: 1668: 1666: 1665: 1660: 1649: 1648: 1624: 1623: 1597: 1595: 1594: 1589: 1563: 1562: 1542: 1540: 1539: 1534: 1511: 1509: 1508: 1503: 1501: 1458: 1456: 1455: 1450: 1439: 1438: 1414: 1413: 1409: 1379: 1377: 1376: 1371: 1337: 1335: 1334: 1329: 1302: 1300: 1299: 1294: 1292: 1255: 1253: 1252: 1247: 1236: 1235: 1211: 1210: 1206: 1176: 1174: 1173: 1168: 1128: 1126: 1125: 1120: 1099: 1097: 1096: 1091: 1071: 1049: 1047: 1046: 1041: 1030: 1029: 1005: 1004: 984: 982: 981: 976: 936: 934: 933: 928: 893: 891: 890: 885: 863: 859: 857: 856: 851: 839: 837: 836: 831: 819: 817: 816: 811: 797: 796: 778: 777: 761: 759: 758: 753: 742: 741: 725: 723: 722: 717: 687: 685: 684: 679: 667: 665: 664: 659: 639: 637: 636: 631: 620:with respect to 619: 617: 616: 611: 581: 579: 578: 573: 561: 559: 558: 553: 529: 527: 526: 521: 509: 507: 506: 501: 499: 498: 493: 480: 478: 477: 472: 460: 458: 457: 452: 414: 412: 411: 406: 390: 388: 387: 382: 366: 364: 363: 358: 346: 344: 343: 338: 322: 320: 319: 314: 303:is the whole of 298: 296: 295: 290: 199: 181: 171: 163: 149: 130: 97: 85: 74:projective space 51: 44:projective index 41: 2271: 2270: 2266: 2265: 2264: 2262: 2261: 2260: 2241: 2240: 2226: 2216: 2198: 2192: 2185: 2177: 2162: 2159: 2147: 2094: 2082: 2081: 2044: 2019: 2011: 2010: 1964: 1959: 1958: 1926: 1925: 1868: 1867: 1830: 1811: 1803: 1802: 1764: 1763: 1731: 1730: 1684: 1672: 1671: 1634: 1609: 1601: 1600: 1554: 1549: 1548: 1522: 1521: 1462: 1461: 1424: 1391: 1383: 1382: 1344: 1343: 1311: 1310: 1259: 1258: 1221: 1188: 1180: 1179: 1135: 1134: 1108: 1107: 1053: 1052: 1015: 996: 988: 987: 943: 942: 916: 915: 870: 869: 842: 841: 822: 821: 782: 769: 764: 763: 733: 728: 727: 690: 689: 670: 669: 650: 649: 622: 621: 584: 583: 564: 563: 544: 543: 530:be a reflexive 512: 511: 488: 483: 482: 463: 462: 425: 424: 421: 397: 396: 373: 372: 349: 348: 329: 328: 305: 304: 281: 280: 265: 194: 173: 165: 155: 144: 131:and each point 125: 87: 76: 46: 36: 17: 12: 11: 5: 2269: 2267: 2259: 2258: 2253: 2243: 2242: 2239: 2238: 2214: 2196: 2182: 2181: 2176:978-1107518438 2175: 2158: 2155: 2146: 2145:Classification 2143: 2140: 2139: 2128: 2125: 2122: 2119: 2116: 2113: 2110: 2107: 2101: 2097: 2093: 2090: 2079: 2068: 2065: 2062: 2057: 2054: 2051: 2047: 2043: 2040: 2037: 2032: 2029: 2026: 2022: 2018: 2008: 1997: 1994: 1991: 1988: 1985: 1982: 1979: 1976: 1971: 1967: 1956: 1953: 1942: 1939: 1936: 1933: 1923: 1919: 1918: 1907: 1904: 1901: 1898: 1895: 1892: 1889: 1886: 1882: 1879: 1876: 1865: 1854: 1851: 1848: 1843: 1840: 1837: 1833: 1829: 1826: 1823: 1818: 1814: 1810: 1800: 1789: 1786: 1783: 1780: 1777: 1774: 1771: 1761: 1758: 1747: 1744: 1741: 1738: 1728: 1724: 1723: 1712: 1709: 1706: 1703: 1700: 1697: 1691: 1687: 1683: 1680: 1669: 1658: 1655: 1652: 1647: 1644: 1641: 1637: 1633: 1630: 1627: 1622: 1619: 1616: 1612: 1608: 1598: 1587: 1584: 1581: 1578: 1575: 1572: 1569: 1566: 1561: 1557: 1546: 1543: 1532: 1529: 1519: 1513: 1512: 1500: 1497: 1494: 1491: 1488: 1485: 1482: 1479: 1476: 1473: 1470: 1459: 1448: 1445: 1442: 1437: 1434: 1431: 1427: 1423: 1420: 1417: 1412: 1408: 1404: 1401: 1398: 1394: 1390: 1380: 1369: 1366: 1363: 1360: 1357: 1354: 1351: 1341: 1338: 1327: 1324: 1321: 1318: 1308: 1304: 1303: 1291: 1288: 1285: 1282: 1279: 1276: 1273: 1270: 1267: 1256: 1245: 1242: 1239: 1234: 1231: 1228: 1224: 1220: 1217: 1214: 1209: 1205: 1201: 1198: 1195: 1191: 1187: 1177: 1166: 1163: 1160: 1157: 1154: 1151: 1148: 1145: 1142: 1132: 1129: 1118: 1115: 1105: 1101: 1100: 1089: 1086: 1083: 1080: 1077: 1074: 1070: 1067: 1064: 1061: 1050: 1039: 1036: 1033: 1028: 1025: 1022: 1018: 1014: 1011: 1008: 1003: 999: 995: 985: 974: 971: 968: 965: 962: 959: 956: 953: 950: 940: 937: 926: 923: 913: 907: 906: 903: 900: 897: 894: 883: 880: 877: 867: 849: 829: 809: 806: 803: 800: 795: 792: 789: 785: 781: 776: 772: 751: 748: 745: 740: 736: 726:is denoted by 715: 712: 709: 706: 703: 700: 697: 677: 657: 629: 609: 606: 603: 600: 597: 594: 591: 571: 551: 536:quadratic form 519: 497: 492: 470: 450: 447: 444: 441: 438: 435: 432: 420: 417: 404: 380: 356: 336: 312: 288: 264: 261: 228:and each line 202: 201: 191: 154:and such that 118: 115: 15: 13: 10: 9: 6: 4: 3: 2: 2268: 2257: 2254: 2252: 2249: 2248: 2246: 2236: 2232: 2225: 2224: 2219: 2215: 2212: 2208: 2204: 2203: 2197: 2191: 2190: 2184: 2183: 2178: 2172: 2168: 2167: 2161: 2160: 2156: 2154: 2151: 2144: 2123: 2120: 2117: 2114: 2111: 2108: 2099: 2080: 2063: 2055: 2052: 2049: 2045: 2038: 2035: 2030: 2027: 2024: 2020: 2009: 1992: 1989: 1986: 1983: 1980: 1977: 1969: 1965: 1957: 1954: 1940: 1937: 1934: 1931: 1924: 1921: 1920: 1902: 1899: 1896: 1893: 1890: 1887: 1866: 1849: 1841: 1838: 1835: 1831: 1824: 1821: 1816: 1812: 1801: 1784: 1781: 1778: 1775: 1769: 1762: 1759: 1745: 1742: 1739: 1736: 1729: 1726: 1725: 1707: 1704: 1701: 1698: 1689: 1670: 1653: 1645: 1642: 1639: 1635: 1628: 1625: 1620: 1617: 1614: 1610: 1599: 1582: 1579: 1576: 1573: 1570: 1567: 1559: 1555: 1547: 1544: 1530: 1527: 1520: 1518: 1515: 1514: 1492: 1489: 1486: 1480: 1460: 1443: 1435: 1432: 1429: 1425: 1418: 1415: 1410: 1406: 1402: 1399: 1396: 1392: 1381: 1364: 1361: 1358: 1355: 1349: 1342: 1339: 1325: 1322: 1319: 1316: 1309: 1306: 1305: 1283: 1277: 1257: 1240: 1232: 1229: 1226: 1222: 1215: 1212: 1207: 1203: 1199: 1196: 1193: 1189: 1178: 1161: 1158: 1155: 1152: 1149: 1146: 1140: 1133: 1130: 1116: 1113: 1106: 1103: 1102: 1084: 1081: 1078: 1075: 1051: 1034: 1026: 1023: 1020: 1016: 1009: 1006: 1001: 997: 986: 969: 966: 963: 960: 957: 954: 948: 941: 938: 924: 921: 914: 912: 909: 908: 904: 901: 898: 895: 881: 878: 875: 868: 865: 864: 861: 847: 827: 807: 804: 801: 798: 793: 790: 787: 783: 779: 774: 770: 746: 738: 734: 710: 707: 704: 698: 695: 675: 655: 647: 643: 627: 604: 601: 598: 592: 589: 569: 549: 541: 537: 533: 517: 495: 468: 445: 442: 439: 433: 430: 418: 416: 402: 394: 378: 370: 354: 334: 326: 310: 302: 286: 278: 269: 262: 260: 258: 254: 249: 247: 243: 240:collinear to 239: 235: 231: 227: 223: 219: 215: 211: 207: 197: 192: 189: 185: 180: 176: 169: 162: 158: 153: 147: 143:of dimension 142: 138: 134: 128: 124:of dimension 123: 119: 116: 113: 109: 105: 104:division ring 101: 95: 91: 83: 79: 75: 71: 67: 66: 65: 63: 59: 55: 49: 45: 39: 34: 30: 26: 22: 2222: 2201: 2188: 2165: 2150:Jacques Tits 2148: 840:is equal to 645: 422: 392: 368: 367:and a point 324: 300: 274: 252: 250: 245: 241: 237: 233: 229: 225: 221: 217: 213: 205: 203: 195: 187: 183: 178: 174: 167: 160: 156: 151: 145: 140: 136: 132: 126: 121: 111: 108:Desarguesian 99: 93: 89: 81: 77: 61: 57: 53: 47: 43: 37: 32: 28: 18: 1545:Hyperbolic 939:Symplectic 911:Alternating 206:polar space 150:containing 29:polar space 21:mathematics 2245:Categories 2157:References 1922:Quadratic 1760:Parabolic 1727:Quadratic 1340:Hermitian 1307:Hermitian 1131:Hermitian 1104:Hermitian 642:Witt index 70:isomorphic 2100:− 2092:Γ 2053:− 2046:θ 1970:− 1955:Elliptic 1878:Γ 1839:− 1832:θ 1682:Γ 1643:− 1636:θ 1618:− 1574:− 1517:Quadratic 1472:Γ 1433:− 1426:θ 1269:Γ 1230:− 1223:θ 1197:− 1153:− 1063:Γ 1024:− 1017:θ 961:− 899:Notation 802:⋯ 791:− 735:θ 62:subspaces 60:, called 2220:(2015), 510:and let 391:so that 323:only if 31:of rank 25:geometry 2235:1153019 2211:3014979 820:. When 371:not on 135:not in 2233:  2209:  2173:  640:. The 542:(when 42:), or 2227:(PDF) 2193:(PDF) 896:Name 866:Form 534:or a 208:is a 88:−1 ≤ 86:with 72:to a 2171:ISBN 646:rank 423:Let 170:− 2) 98:and 96:− 1) 27:, a 198:− 1 164:is 148:− 1 129:− 1 92:≤ ( 50:− 1 40:≥ 3 19:In 2247:: 2231:MR 2207:MR 415:. 327:∈ 259:. 248:. 232:∈ 224:∈ 177:∩ 159:∩ 102:a 2180:. 2127:) 2124:q 2121:, 2118:2 2115:+ 2112:r 2109:2 2106:( 2096:O 2089:P 2067:) 2064:q 2061:( 2056:1 2050:r 2042:) 2039:1 2036:+ 2031:1 2028:+ 2025:r 2021:q 2017:( 1996:) 1993:q 1990:, 1987:1 1984:+ 1981:r 1978:2 1975:( 1966:Q 1941:2 1938:+ 1935:r 1932:2 1906:) 1903:q 1900:, 1897:1 1894:+ 1891:r 1888:2 1885:( 1881:O 1875:P 1853:) 1850:q 1847:( 1842:1 1836:r 1828:) 1825:1 1822:+ 1817:r 1813:q 1809:( 1788:) 1785:q 1782:, 1779:r 1776:2 1773:( 1770:Q 1746:1 1743:+ 1740:r 1737:2 1711:) 1708:q 1705:, 1702:r 1699:2 1696:( 1690:+ 1686:O 1679:P 1657:) 1654:q 1651:( 1646:1 1640:r 1632:) 1629:1 1626:+ 1621:1 1615:r 1611:q 1607:( 1586:) 1583:q 1580:, 1577:1 1571:r 1568:2 1565:( 1560:+ 1556:Q 1531:r 1528:2 1499:) 1496:q 1493:, 1490:1 1487:+ 1484:r 1481:2 1478:( 1475:U 1469:P 1447:) 1444:q 1441:( 1436:1 1430:r 1422:) 1419:1 1416:+ 1411:2 1407:/ 1403:1 1400:+ 1397:r 1393:q 1389:( 1368:) 1365:q 1362:, 1359:r 1356:2 1353:( 1350:H 1326:1 1323:+ 1320:r 1317:2 1290:) 1287:q 1284:, 1281:r 1278:2 1275:( 1272:U 1266:P 1244:) 1241:q 1238:( 1233:1 1227:r 1219:) 1216:1 1213:+ 1208:2 1204:/ 1200:1 1194:r 1190:q 1186:( 1165:) 1162:q 1159:, 1156:1 1150:r 1147:2 1144:( 1141:H 1117:r 1114:2 1088:) 1085:q 1082:, 1079:r 1076:2 1073:( 1069:p 1066:S 1060:P 1038:) 1035:q 1032:( 1027:1 1021:r 1013:) 1010:1 1007:+ 1002:r 998:q 994:( 973:) 970:q 967:, 964:1 958:r 955:2 952:( 949:W 925:r 922:2 882:1 879:+ 876:n 848:2 828:r 808:1 805:+ 799:+ 794:1 788:k 784:q 780:+ 775:k 771:q 750:) 747:q 744:( 739:k 714:) 711:q 708:, 705:k 702:( 699:G 696:P 676:r 656:n 628:f 608:) 605:q 602:, 599:n 596:( 593:G 590:P 570:f 550:f 518:f 496:q 491:F 469:n 449:) 446:q 443:, 440:n 437:( 434:G 431:P 403:l 393:p 379:l 369:p 355:l 335:l 325:p 311:l 301:p 287:l 253:P 246:l 242:p 238:l 234:L 230:l 226:P 222:p 218:L 216:, 214:P 212:( 200:. 196:n 190:. 188:p 184:A 179:B 175:A 168:n 166:( 161:B 157:A 152:p 146:n 141:B 137:A 133:p 127:n 122:A 112:d 100:K 94:n 90:d 84:) 82:K 80:( 78:P 58:P 54:P 48:n 38:n 35:( 33:n

Index

mathematics
geometry
isomorphic
projective space
division ring
Desarguesian
partial linear space
combinatorial objects

generalized quadrangle
sesquilinear form
quadratic form
totally isotropic subspaces
Witt index
Alternating
Quadratic
Jacques Tits
Finite Geometry and Combinatorial Applications
ISBN
978-1107518438
Prehistory and History of Polar Spaces and of Generalized Polygons
Diagram Geometry: Related to classical groups and buildings
MR
3014979
Cameron, Peter J.
Projective and polar spaces
MR
1153019
Categories
Families of sets

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