Knowledge (XXG)

Lemniscate of Bernoulli

Source 📝

1082: 20: 1857: 1493: 2014: 60: 1252: 566: 1488:{\displaystyle {\begin{aligned}L&=4{\sqrt {2}}\,c\int _{0}^{1}{\frac {dt}{\sqrt {1-t^{4}}}}=4{\sqrt {2}}\,c\,\operatorname {arcsl} 1\\&={\frac {\Gamma (1/4)^{2}}{\sqrt {\pi }}}\,c={\frac {2\pi }{\operatorname {M} (1,1/{\sqrt {2}})}}c\approx 7{.}416\cdot c\end{aligned}}} 45: 1237: 702: 827: 400: 1847: 1257: 2249: 405: 889: 1151: 1540: 967: 1018: 1081: 1681: 1651: 2284: 1777: 1753: 1729: 1705: 1624: 1600: 1576: 1516: 581: 1063: 2188: 2312: 713: 325:
of these distances is constant. In the case where the curve passes through the point midway between the foci, the oval is a lemniscate of Bernoulli.
561:{\displaystyle {\begin{aligned}\left(x^{2}+y^{2}\right)^{2}&=a^{2}\left(x^{2}-y^{2}\right)\\&=2c^{2}\left(x^{2}-y^{2}\right)\end{aligned}}} 2387: 1865: 1782: 2487: 2433: 974: 1543: 2347: 2193: 1086: 1076: 1111: 389: 1232:{\displaystyle \operatorname {arcsl} x{\stackrel {\text{def}}{{}={}}}\int _{0}^{x}{\frac {dt}{\sqrt {1-t^{4}}}}} 2559: 2373: 1128: 842: 2554: 348:, with the lengths of the three bars of the linkage and the distance between its endpoints chosen to form a 90: 1124: 2522: 2549: 1525: 1025: 314: 2323:
Dynamics on this curve and its more generalized versions are studied in quasi-one-dimensional models.
904: 2337: 2533: 2342: 2332: 573: 302: 1089:
relate the arc length of an arc of the lemniscate to the distance of one endpoint from the origin.
2404: 2090: 341: 329: 2527: 1850: 1659: 1629: 697:{\displaystyle x={\frac {a\cos t}{1+\sin ^{2}t}};\qquad y={\frac {a\sin t\cos t}{1+\sin ^{2}t}}} 2254: 1758: 1734: 1710: 1686: 1605: 1581: 1557: 982: 2505: 2483: 2454: 2429: 2383: 1864:
The following theorem about angles occurring in the lemniscate is due to German mathematician
1102: 1098: 834: 349: 345: 340:
centered at the center of the hyperbola (bisector of its two foci). It may also be drawn by a
86: 63: 2379: 1501: 2479: 2472: 1989: 1138: 1120: 1033: 2161: 294: 283: 122: 2289: 270: 44: 1519: 1116: 19: 2543: 896: 1856: 2352: 2013: 318: 279: 822:{\displaystyle x=a{\frac {t+t^{3}}{1+t^{4}}};\qquad y=a{\frac {t-t^{3}}{1+t^{4}}}} 59: 2508: 1106: 202: 49: 1094: 290: 261: 2513: 2155: 2094: 333: 106: 53: 1654: 392: 306: 265: 194: 154: 138: 2523:"Lemniscate of Bernoulli" at The MacTutor History of Mathematics archive 298: 337: 170: 1109:(largely unpublished at the time, but allusions in the notes to his 2409: 2148: 2012: 1855: 1080: 278:
for "decorated with hanging ribbons". It is a special case of the
275: 43: 18: 2375:
How round is your circle? Where Engineering and Mathematics Meet
2058:
The lemniscate is symmetric to the midpoint of the line segment
1101:, as was discovered in the eighteenth century. Around 1800, the 1842:{\displaystyle |{\widehat {\rm {APM}}}-{\widehat {\rm {BPM}}}|} 2040:
and as well to the perpendicular bisector of the line segment
2403:
Lemmermeyer, Franz (2011). "Parametrizing Algebraic Curves".
1868:, who described it 1843 in his dissertation on lemniscates. 2022:
The lemniscate is symmetric to the line connecting its foci
1916:
is any point on the lemniscate outside the line connecting
360:
The equations can be stated in terms of the focal distance
2106:
are perpendicular, and each of them forms an angle of
1123:. For this reason the case of elliptic functions with 1119:
are of a very special form, being proportional to the
2292: 2257: 2196: 2164: 1785: 1761: 1737: 1713: 1689: 1662: 1632: 1608: 1584: 1560: 1528: 1504: 1255: 1154: 1036: 985: 907: 845: 716: 584: 403: 2244:{\displaystyle {3 \over a^{2}}{\sqrt {x^{2}+y^{2}}}} 321:, by contrast, is the locus of points for which the 2471: 2306: 2278: 2243: 2182: 1841: 1771: 1747: 1723: 1699: 1675: 1645: 1618: 1594: 1570: 1534: 1510: 1487: 1231: 1057: 1012: 961: 883: 821: 696: 560: 1982:is one third of the triangle's exterior angle at 1860:relation between angles at Bernoulli's lemniscate 368:of a lemniscate. These parameters are related as 2372:Bryant, John; Sangwin, Christopher J. (2008), 2017:The inversion of hyperbola yields a lemniscate 2151:tangent to its inner equator is a lemniscate. 8: 2424:Eymard, Pierre; Lafon, Jean-Pierre (2004). 23:A lemniscate of Bernoulli and its two foci 1105:inverting those integrals were studied by 2534:Coup d'œil sur la lemniscate de Bernoulli 2408: 2296: 2291: 2256: 2251:. The maximum curvature, which occurs at 2233: 2220: 2214: 2206: 2197: 2195: 2163: 1970:. Now the interior angle of the triangle 1834: 1817: 1815: 1814: 1794: 1792: 1791: 1786: 1784: 1763: 1762: 1760: 1739: 1738: 1736: 1715: 1714: 1712: 1691: 1690: 1688: 1683:can also be defined as the set of points 1664: 1663: 1661: 1634: 1633: 1631: 1610: 1609: 1607: 1586: 1585: 1583: 1562: 1561: 1559: 1527: 1503: 1467: 1445: 1440: 1411: 1404: 1390: 1378: 1366: 1346: 1342: 1335: 1320: 1299: 1293: 1288: 1280: 1273: 1256: 1254: 1220: 1199: 1193: 1188: 1176: 1173: 1168: 1167: 1165: 1164: 1153: 1035: 1004: 984: 953: 941: 927: 922: 908: 906: 863: 850: 844: 810: 792: 779: 757: 739: 726: 715: 679: 643: 618: 591: 583: 543: 530: 515: 487: 474: 459: 442: 431: 418: 404: 402: 1755:, together with the locus of the points 884:{\displaystyle r^{2}=a^{2}\cos 2\theta } 58: 2364: 2147:The planar cross-section of a standard 2076:The area enclosed by the lemniscate is 260:. The curve has a shape similar to the 234:from each other as the locus of points 2449:Alexander Ostermann, Gerhard Wanner: 1992:). In addition the interior angle at 395:is (up to translation and rotation): 7: 1895:is the midpoint of the line segment 1866:Gerhard Christoph Hermann Vechtmann 1097:of arcs of the lemniscate leads to 305:of points for which the sum of the 48:The lemniscate of Bernoulli is the 1824: 1821: 1818: 1801: 1798: 1795: 1764: 1740: 1716: 1692: 1668: 1665: 1638: 1635: 1611: 1587: 1563: 1535:{\displaystyle \operatorname {M} } 1529: 1505: 1422: 1369: 328:This curve can be obtained as the 14: 2474:A catalog of special plane curves 2428:. American Mathematical Society. 2100:The two tangents at the midpoint 1071:Arc length and elliptic functions 1889:are the foci of the lemniscate, 962:{\displaystyle |z-c||z+c|=c^{2}} 2478:. Dover Publications. pp.  1998:is twice the interior angle at 1946:intersects the line connecting 769: 636: 293:was first described in 1694 by 2378:, Princeton University Press, 2273: 2258: 2177: 2165: 1835: 1787: 1452: 1428: 1387: 1372: 1242:the formula of the arc length 975:two-center bipolar coordinates 942: 928: 923: 909: 205:defined from two given points 1: 2348:Lemniscatic elliptic function 1077:Lemniscate elliptic functions 1145:Using the elliptic integral 708:A rational parametrization: 2480:4–5, 121–123, 145, 151, 184 2470:J. Dennis Lawrence (1972). 1112:Disquisitiones Arithmeticae 2576: 1676:{\displaystyle {\rm {AB}}} 1646:{\displaystyle {\rm {AB}}} 1554:Given two distinct points 1087:lemniscate sine and cosine 1074: 1026:rational polar coordinates 2528:"Lemniscate of Bernoulli" 2279:{\displaystyle (\pm a,0)} 2126:with the line connecting 1772:{\displaystyle {\rm {P}}} 1748:{\displaystyle {\rm {M}}} 1724:{\displaystyle {\rm {B}}} 1700:{\displaystyle {\rm {A}}} 1653:. Then the lemniscate of 1619:{\displaystyle {\rm {M}}} 1595:{\displaystyle {\rm {B}}} 1571:{\displaystyle {\rm {A}}} 1544:arithmetic–geometric mean 1093:The determination of the 1013:{\displaystyle rr'=c^{2}} 268:symbol. Its name is from 89:and their equivalents in 2451:Geometry by Its History. 297:as a modification of an 1511:{\displaystyle \Gamma } 199:lemniscate of Bernoulli 187:Lemniscate of Bernoulli 91:rectangular coordinates 2308: 2280: 2245: 2184: 2089:The lemniscate is the 2018: 1861: 1849:is a right angle (cf. 1843: 1773: 1749: 1725: 1701: 1677: 1647: 1620: 1596: 1572: 1536: 1512: 1489: 1233: 1125:complex multiplication 1090: 1059: 1058:{\displaystyle Q=2s-1} 1014: 963: 885: 823: 698: 562: 269: 190: 56: 41: 2309: 2281: 2246: 2185: 2183:{\displaystyle (x,y)} 2016: 1940:of the lemniscate in 1859: 1844: 1774: 1750: 1726: 1702: 1678: 1648: 1621: 1597: 1573: 1537: 1513: 1490: 1234: 1084: 1060: 1015: 964: 886: 824: 699: 563: 350:crossed parallelogram 336:, with the inversion 309:to each of two fixed 62: 47: 22: 16:Plane algebraic curve 2453:Springer, 2012, pp. 2338:Lemniscate of Gerono 2290: 2255: 2194: 2162: 1783: 1759: 1735: 1711: 1687: 1660: 1630: 1606: 1582: 1558: 1526: 1502: 1253: 1152: 1034: 983: 905: 895:Its equation in the 843: 714: 582: 401: 2343:Lemniscate constant 2333:Lemniscate of Booth 2307:{\displaystyle 3/a} 1853:and its converse). 1626:be the midpoint of 1298: 1198: 574:parametric equation 2506:Weisstein, Eric W. 2304: 2276: 2241: 2180: 2019: 2009:Further properties 1862: 1839: 1769: 1745: 1721: 1697: 1673: 1643: 1616: 1592: 1568: 1532: 1508: 1485: 1483: 1284: 1229: 1184: 1103:elliptic functions 1099:elliptic integrals 1091: 1055: 1010: 959: 881: 819: 694: 558: 556: 364:or the half-width 342:mechanical linkage 282:and is a rational 191: 64:Sinusoidal spirals 57: 42: 2389:978-0-691-13118-4 2239: 2212: 1831: 1808: 1456: 1450: 1402: 1401: 1340: 1327: 1326: 1278: 1227: 1226: 1181: 1179: 1142:in some sources. 1121:Gaussian integers 835:polar coordinates 817: 764: 692: 631: 330:inverse transform 87:polar coordinates 52:of a rectangular 2567: 2519: 2518: 2493: 2477: 2457: 2447: 2441: 2439: 2421: 2415: 2414: 2412: 2400: 2394: 2392: 2369: 2313: 2311: 2310: 2305: 2300: 2285: 2283: 2282: 2277: 2250: 2248: 2247: 2242: 2240: 2238: 2237: 2225: 2224: 2215: 2213: 2211: 2210: 2198: 2189: 2187: 2186: 2181: 2143: 2134: 2125: 2124: 2122: 2121: 2118: 2115: 2114: 2105: 2091:circle inversion 2085: 2072: 2054: 2039: 2030: 2003: 1997: 1990:angle trisection 1987: 1981: 1975: 1969: 1963: 1954: 1945: 1939: 1933: 1924: 1915: 1909: 1894: 1888: 1879: 1848: 1846: 1845: 1840: 1838: 1833: 1832: 1827: 1816: 1810: 1809: 1804: 1793: 1790: 1778: 1776: 1775: 1770: 1768: 1767: 1754: 1752: 1751: 1746: 1744: 1743: 1730: 1728: 1727: 1722: 1720: 1719: 1706: 1704: 1703: 1698: 1696: 1695: 1682: 1680: 1679: 1674: 1672: 1671: 1652: 1650: 1649: 1644: 1642: 1641: 1625: 1623: 1622: 1617: 1615: 1614: 1601: 1599: 1598: 1593: 1591: 1590: 1577: 1575: 1574: 1569: 1567: 1566: 1541: 1539: 1538: 1533: 1517: 1515: 1514: 1509: 1494: 1492: 1491: 1486: 1484: 1471: 1457: 1455: 1451: 1446: 1444: 1420: 1412: 1403: 1397: 1396: 1395: 1394: 1382: 1367: 1359: 1341: 1336: 1328: 1325: 1324: 1309: 1308: 1300: 1297: 1292: 1279: 1274: 1246:can be given as 1245: 1238: 1236: 1235: 1230: 1228: 1225: 1224: 1209: 1208: 1200: 1197: 1192: 1183: 1182: 1180: 1177: 1175: 1174: 1169: 1166: 1139:lemniscatic case 1134: 1133: 1064: 1062: 1061: 1056: 1019: 1017: 1016: 1011: 1009: 1008: 996: 968: 966: 965: 960: 958: 957: 945: 931: 926: 912: 890: 888: 887: 882: 868: 867: 855: 854: 828: 826: 825: 820: 818: 816: 815: 814: 798: 797: 796: 780: 765: 763: 762: 761: 745: 744: 743: 727: 703: 701: 700: 695: 693: 691: 684: 683: 667: 644: 632: 630: 623: 622: 606: 592: 567: 565: 564: 559: 557: 553: 549: 548: 547: 535: 534: 520: 519: 501: 497: 493: 492: 491: 479: 478: 464: 463: 447: 446: 441: 437: 436: 435: 423: 422: 383: 382: 381: 367: 363: 259: 239: 233: 222: 213: 184: 177: 168: 161: 152: 145: 136: 129: 120: 113: 104: 97: 84: 40: 31: 2575: 2574: 2570: 2569: 2568: 2566: 2565: 2564: 2560:Spiric sections 2540: 2539: 2504: 2503: 2500: 2490: 2469: 2466: 2461: 2460: 2448: 2444: 2436: 2423: 2422: 2418: 2402: 2401: 2397: 2390: 2371: 2370: 2366: 2361: 2329: 2321: 2288: 2287: 2286:, is therefore 2253: 2252: 2229: 2216: 2202: 2192: 2191: 2160: 2159: 2142: 2136: 2133: 2127: 2119: 2116: 2112: 2111: 2110: 2108: 2107: 2101: 2097:and vice versa. 2077: 2071: 2065: 2059: 2053: 2047: 2041: 2038: 2032: 2029: 2023: 2011: 1999: 1993: 1983: 1977: 1971: 1965: 1962: 1956: 1953: 1947: 1941: 1935: 1932: 1926: 1923: 1917: 1911: 1908: 1902: 1896: 1890: 1887: 1881: 1878: 1872: 1851:Thales' theorem 1781: 1780: 1757: 1756: 1733: 1732: 1709: 1708: 1685: 1684: 1658: 1657: 1628: 1627: 1604: 1603: 1580: 1579: 1556: 1555: 1552: 1524: 1523: 1500: 1499: 1482: 1481: 1421: 1413: 1386: 1368: 1357: 1356: 1316: 1301: 1263: 1251: 1250: 1243: 1216: 1201: 1150: 1149: 1131: 1129: 1117:period lattices 1079: 1073: 1032: 1031: 1000: 989: 981: 980: 949: 903: 902: 859: 846: 841: 840: 806: 799: 788: 781: 753: 746: 735: 728: 712: 711: 675: 668: 645: 614: 607: 593: 580: 579: 555: 554: 539: 526: 525: 521: 511: 499: 498: 483: 470: 469: 465: 455: 448: 427: 414: 413: 409: 408: 399: 398: 379: 377: 369: 365: 361: 358: 344:in the form of 301:, which is the 295:Jakob Bernoulli 284:algebraic curve 254: 247: 241: 235: 228: 221: 215: 212: 206: 189: 179: 175: 173: 163: 159: 157: 147: 143: 141: 131: 127: 125: 115: 111: 109: 99: 95: 67: 39: 33: 30: 24: 17: 12: 11: 5: 2573: 2571: 2563: 2562: 2557: 2555:Quartic curves 2552: 2542: 2541: 2538: 2537: 2531: 2525: 2520: 2499: 2498:External links 2496: 2495: 2494: 2488: 2465: 2462: 2459: 2458: 2442: 2434: 2416: 2395: 2388: 2363: 2362: 2360: 2357: 2356: 2355: 2350: 2345: 2340: 2335: 2328: 2325: 2320: 2317: 2316: 2315: 2303: 2299: 2295: 2275: 2272: 2269: 2266: 2263: 2260: 2236: 2232: 2228: 2223: 2219: 2209: 2205: 2201: 2179: 2176: 2173: 2170: 2167: 2152: 2145: 2140: 2131: 2098: 2087: 2074: 2069: 2063: 2056: 2051: 2045: 2036: 2027: 2010: 2007: 2006: 2005: 1960: 1951: 1930: 1921: 1906: 1900: 1885: 1876: 1837: 1830: 1826: 1823: 1820: 1813: 1807: 1803: 1800: 1797: 1789: 1766: 1742: 1718: 1694: 1670: 1667: 1640: 1637: 1613: 1589: 1565: 1551: 1548: 1531: 1520:gamma function 1507: 1496: 1495: 1480: 1477: 1474: 1470: 1466: 1463: 1460: 1454: 1449: 1443: 1439: 1436: 1433: 1430: 1427: 1424: 1419: 1416: 1410: 1407: 1400: 1393: 1389: 1385: 1381: 1377: 1374: 1371: 1365: 1362: 1360: 1358: 1355: 1352: 1349: 1345: 1339: 1334: 1331: 1323: 1319: 1315: 1312: 1307: 1304: 1296: 1291: 1287: 1283: 1277: 1272: 1269: 1266: 1264: 1262: 1259: 1258: 1240: 1239: 1223: 1219: 1215: 1212: 1207: 1204: 1196: 1191: 1187: 1172: 1163: 1160: 1157: 1136:is called the 1075:Main article: 1072: 1069: 1068: 1067: 1066: 1065: 1054: 1051: 1048: 1045: 1042: 1039: 1022: 1021: 1020: 1007: 1003: 999: 995: 992: 988: 971: 970: 969: 956: 952: 948: 944: 940: 937: 934: 930: 925: 921: 918: 915: 911: 893: 892: 891: 880: 877: 874: 871: 866: 862: 858: 853: 849: 831: 830: 829: 813: 809: 805: 802: 795: 791: 787: 784: 778: 775: 772: 768: 760: 756: 752: 749: 742: 738: 734: 731: 725: 722: 719: 706: 705: 704: 690: 687: 682: 678: 674: 671: 666: 663: 660: 657: 654: 651: 648: 642: 639: 635: 629: 626: 621: 617: 613: 610: 605: 602: 599: 596: 590: 587: 570: 569: 568: 552: 546: 542: 538: 533: 529: 524: 518: 514: 510: 507: 504: 502: 500: 496: 490: 486: 482: 477: 473: 468: 462: 458: 454: 451: 449: 445: 440: 434: 430: 426: 421: 417: 412: 407: 406: 357: 354: 346:Watt's linkage 252: 245: 227:, at distance 219: 210: 174: 158: 142: 126: 110: 105:: Equilateral 94: 37: 28: 15: 13: 10: 9: 6: 4: 3: 2: 2572: 2561: 2558: 2556: 2553: 2551: 2548: 2547: 2545: 2535: 2532: 2530:at MathCurve. 2529: 2526: 2524: 2521: 2516: 2515: 2510: 2507: 2502: 2501: 2497: 2491: 2489:0-486-60288-5 2485: 2481: 2476: 2475: 2468: 2467: 2463: 2456: 2452: 2446: 2443: 2437: 2435:0-8218-3246-8 2431: 2427: 2426:The Number Pi 2420: 2417: 2411: 2406: 2399: 2396: 2391: 2385: 2381: 2377: 2376: 2368: 2365: 2358: 2354: 2351: 2349: 2346: 2344: 2341: 2339: 2336: 2334: 2331: 2330: 2326: 2324: 2318: 2301: 2297: 2293: 2270: 2267: 2264: 2261: 2234: 2230: 2226: 2221: 2217: 2207: 2203: 2199: 2174: 2171: 2168: 2157: 2153: 2150: 2146: 2139: 2130: 2104: 2099: 2096: 2092: 2088: 2084: 2080: 2075: 2068: 2062: 2057: 2050: 2044: 2035: 2026: 2021: 2020: 2015: 2008: 2002: 1996: 1991: 1986: 1980: 1974: 1968: 1959: 1950: 1944: 1938: 1934:. The normal 1929: 1920: 1914: 1905: 1899: 1893: 1884: 1875: 1871: 1870: 1869: 1867: 1858: 1854: 1852: 1828: 1811: 1805: 1656: 1549: 1547: 1545: 1521: 1478: 1475: 1472: 1468: 1464: 1461: 1458: 1447: 1441: 1437: 1434: 1431: 1425: 1417: 1414: 1408: 1405: 1398: 1391: 1383: 1379: 1375: 1363: 1361: 1353: 1350: 1347: 1343: 1337: 1332: 1329: 1321: 1317: 1313: 1310: 1305: 1302: 1294: 1289: 1285: 1281: 1275: 1270: 1267: 1265: 1260: 1249: 1248: 1247: 1221: 1217: 1213: 1210: 1205: 1202: 1194: 1189: 1185: 1170: 1161: 1158: 1155: 1148: 1147: 1146: 1143: 1141: 1140: 1135: 1126: 1122: 1118: 1114: 1113: 1108: 1104: 1100: 1096: 1088: 1083: 1078: 1070: 1052: 1049: 1046: 1043: 1040: 1037: 1030: 1029: 1027: 1023: 1005: 1001: 997: 993: 990: 986: 979: 978: 976: 972: 954: 950: 946: 938: 935: 932: 919: 916: 913: 901: 900: 898: 897:complex plane 894: 878: 875: 872: 869: 864: 860: 856: 851: 847: 839: 838: 836: 832: 811: 807: 803: 800: 793: 789: 785: 782: 776: 773: 770: 766: 758: 754: 750: 747: 740: 736: 732: 729: 723: 720: 717: 710: 709: 707: 688: 685: 680: 676: 672: 669: 664: 661: 658: 655: 652: 649: 646: 640: 637: 633: 627: 624: 619: 615: 611: 608: 603: 600: 597: 594: 588: 585: 578: 577: 575: 571: 550: 544: 540: 536: 531: 527: 522: 516: 512: 508: 505: 503: 494: 488: 484: 480: 475: 471: 466: 460: 456: 452: 450: 443: 438: 432: 428: 424: 419: 415: 410: 397: 396: 394: 391: 387: 386: 385: 376: 372: 355: 353: 351: 347: 343: 339: 335: 331: 326: 324: 320: 316: 312: 308: 304: 300: 296: 292: 287: 286:of degree 4. 285: 281: 277: 273: 272: 267: 263: 258: 251: 244: 238: 232: 226: 218: 209: 204: 200: 196: 188: 182: 172: 166: 156: 150: 140: 134: 124: 118: 108: 102: 92: 88: 82: 78: 74: 70: 65: 61: 55: 51: 46: 36: 27: 21: 2550:Plane curves 2512: 2509:"Lemniscate" 2473: 2450: 2445: 2425: 2419: 2398: 2374: 2367: 2353:Cassini oval 2322: 2319:Applications 2137: 2128: 2102: 2082: 2078: 2066: 2060: 2048: 2042: 2033: 2024: 2000: 1994: 1984: 1978: 1972: 1966: 1957: 1948: 1942: 1936: 1927: 1918: 1912: 1903: 1897: 1891: 1882: 1873: 1863: 1553: 1497: 1241: 1144: 1137: 1110: 1092: 374: 370: 359: 327: 322: 319:Cassini oval 311:focal points 310: 288: 280:Cassini oval 256: 249: 242: 236: 230: 224: 216: 207: 198: 192: 186: 180: 164: 148: 132: 116: 100: 80: 76: 72: 68: 34: 25: 2536:(in French) 1107:C. F. Gauss 274:, which is 271:lemniscatus 264:and to the 223:, known as 203:plane curve 50:pedal curve 2544:Categories 2464:References 1988:(see also 1779:such that 1095:arc length 291:lemniscate 2514:MathWorld 2410:1108.6219 2380:pp. 58–59 2262:± 2156:curvature 2095:hyperbola 1829:^ 1812:− 1806:^ 1506:Γ 1476:⋅ 1462:≈ 1426:⁡ 1418:π 1399:π 1370:Γ 1351:⁡ 1314:− 1286:∫ 1214:− 1186:∫ 1159:⁡ 1050:− 917:− 879:θ 873:⁡ 786:− 686:⁡ 662:⁡ 653:⁡ 625:⁡ 601:⁡ 537:− 481:− 390:Cartesian 356:Equations 334:hyperbola 307:distances 262:numeral 8 107:hyperbola 71:= –1 cos( 54:hyperbola 2327:See also 1655:diameter 994:′ 393:equation 315:constant 240:so that 195:geometry 155:Cardioid 139:Parabola 2455:207-208 2123:⁠ 2109:⁠ 1542:is the 1518:is the 1130:√ 1115:). The 378:√ 323:product 299:ellipse 2486:  2440:p. 200 2432:  2386:  1602:, let 1550:Angles 1498:where 338:circle 197:, the 178:  176:  171:Circle 162:  160:  146:  144:  135:= −1/2 130:  128:  114:  112:  98:  96:  2405:arXiv 2359:Notes 2149:torus 2093:of a 1348:arcsl 1156:arcsl 572:As a 332:of a 313:is a 303:locus 289:This 276:Latin 201:is a 151:= 1/2 85:) in 2484:ISBN 2430:ISBN 2384:ISBN 2154:The 2135:and 2031:and 1955:and 1925:and 1910:and 1880:and 1578:and 1522:and 1085:The 899:is: 388:Its 317:. A 225:foci 214:and 123:Line 119:= −1 103:= −2 32:and 2190:is 2158:at 2081:= 2 1976:at 1973:OPR 1964:in 1473:416 1178:def 1127:by 1024:In 973:In 870:cos 833:In 677:sin 659:cos 650:sin 616:sin 598:cos 193:In 183:= 2 167:= 1 75:), 2546:: 2511:. 2482:. 2382:, 1731:, 1707:, 1546:. 1132:−1 1028:: 977:: 837:: 576:: 384:. 373:= 352:. 255:= 250:PF 243:PF 185:: 169:: 153:: 137:: 121:: 93:: 83:/2 79:= 73:nθ 2517:. 2492:. 2438:. 2413:. 2407:: 2393:. 2314:. 2302:a 2298:/ 2294:3 2274:) 2271:0 2268:, 2265:a 2259:( 2235:2 2231:y 2227:+ 2222:2 2218:x 2208:2 2204:a 2200:3 2178:) 2175:y 2172:, 2169:x 2166:( 2144:. 2141:2 2138:F 2132:1 2129:F 2120:4 2117:/ 2113:π 2103:O 2086:. 2083:c 2079:a 2073:. 2070:2 2067:F 2064:1 2061:F 2055:. 2052:2 2049:F 2046:1 2043:F 2037:2 2034:F 2028:1 2025:F 2004:. 2001:O 1995:P 1985:R 1979:O 1967:R 1961:2 1958:F 1952:1 1949:F 1943:P 1937:n 1931:2 1928:F 1922:1 1919:F 1913:P 1907:2 1904:F 1901:1 1898:F 1892:O 1886:2 1883:F 1877:1 1874:F 1836:| 1825:M 1822:P 1819:B 1802:M 1799:P 1796:A 1788:| 1765:P 1741:M 1717:B 1693:A 1669:B 1666:A 1639:B 1636:A 1612:M 1588:B 1564:A 1530:M 1479:c 1469:. 1465:7 1459:c 1453:) 1448:2 1442:/ 1438:1 1435:, 1432:1 1429:( 1423:M 1415:2 1409:= 1406:c 1392:2 1388:) 1384:4 1380:/ 1376:1 1373:( 1364:= 1354:1 1344:c 1338:2 1333:4 1330:= 1322:4 1318:t 1311:1 1306:t 1303:d 1295:1 1290:0 1282:c 1276:2 1271:4 1268:= 1261:L 1244:L 1222:4 1218:t 1211:1 1206:t 1203:d 1195:x 1190:0 1171:= 1162:x 1053:1 1047:s 1044:2 1041:= 1038:Q 1006:2 1002:c 998:= 991:r 987:r 955:2 951:c 947:= 943:| 939:c 936:+ 933:z 929:| 924:| 920:c 914:z 910:| 876:2 865:2 861:a 857:= 852:2 848:r 812:4 808:t 804:+ 801:1 794:3 790:t 783:t 777:a 774:= 771:y 767:; 759:4 755:t 751:+ 748:1 741:3 737:t 733:+ 730:t 724:a 721:= 718:x 689:t 681:2 673:+ 670:1 665:t 656:t 647:a 641:= 638:y 634:; 628:t 620:2 612:+ 609:1 604:t 595:a 589:= 586:x 551:) 545:2 541:y 532:2 528:x 523:( 517:2 513:c 509:2 506:= 495:) 489:2 485:y 476:2 472:x 467:( 461:2 457:a 453:= 444:2 439:) 433:2 429:y 425:+ 420:2 416:x 411:( 380:2 375:c 371:a 366:a 362:c 266:∞ 257:c 253:2 248:· 246:1 237:P 231:c 229:2 220:2 217:F 211:1 208:F 181:n 165:n 149:n 133:n 117:n 101:n 81:π 77:θ 69:r 66:( 38:2 35:F 29:1 26:F

Index



pedal curve
hyperbola

Sinusoidal spirals
polar coordinates
rectangular coordinates
hyperbola
Line
Parabola
Cardioid
Circle
Lemniscate of Bernoulli
geometry
plane curve
numeral 8

lemniscatus
Latin
Cassini oval
algebraic curve
lemniscate
Jakob Bernoulli
ellipse
locus
distances
constant
Cassini oval
inverse transform

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.