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Cubic plane curve

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408: 3686: 3073: 1807: 2063: 1295: 38: 2798: 489:. However, only three of these points may be real, so that the others cannot be seen in the real projective plane by drawing the curve. The nine inflection points of a non-singular cubic have the property that every line passing through two of them contains exactly three inflection points. 3663:
lies on the line of the circumcenter and the symmedian point (i.e., the Brocard axis). The cubic passes through the centroid, symmedian point, both Fermat points, both isodynamic points, the Parry point, other triangle centers, and the vertices of the 2nd and 4th Brocard triangles.
2392: 1646: 2731: 500:; it appears as one or three infinite branches, containing the three real inflection points. The other oval, if it exists, does not contain any real inflection point and appears either as an oval or as two infinite branches. Like for 3933: 3348: 1459: 3050:
The Lucas cubic passes through the centroid, orthocenter, Gergonne point, Nagel point, de Longchamps point, other triangle centers, the vertices of the anticomplementary triangle, and the foci of the Steiner circumellipse.
2202: 354: 3643: 4263: 3222: 3035: 2926: 1285: 3527: 3807: 1995: 1028: 2560: 4148: 1908: 797: 1109: 867: 496:. The real points of a non-singular projective cubic fall into one or two 'ovals'. One of these ovals crosses every real projective line, and thus is never bounded when the cubic is drawn in the 388:. Therefore, we can find some cubic curve through any nine given points, which may be degenerate, and may not be unique, but will be unique and non-degenerate if the points are in 2209: 1466: 4396: 2567: 4348: 116: 1210: 4303: 703: 662: 621: 164: 3408:
The 1st Brocard cubic passes through the centroid, symmedian point, Steiner point, other triangle centers, and the vertices of the 1st and 3rd Brocard triangles.
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The Thomson cubic passes through the following points: incenter, centroid, circumcenter, orthocenter, symmedian point, other triangle centers, the vertices
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The Napoleon–Feuerbach cubic passes through the incenter, circumcenter, orthocenter, 1st and 2nd Napoleon points, other triangle centers, the vertices
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The 1st equal areas cubic passes through the incenter, Steiner point, other triangle centers, the 1st and 2nd Brocard points, and the excenters.
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the excenters, the projections of the centroid on the altitudes, and the centers of the 6 equilateral triangles erected on the sides of
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The Darboux cubic passes through the incenter, circumcenter, orthocenter, de Longchamps point, other triangle centers, the vertices
4822: 4007: 450: 5392: 5029: 4989: 4870: 1842: 729: 717: 1039: 808: 558:. A reducible plane cubic curve is either a conic and a line or three lines, and accordingly have two double points or a 516: 5469: 5080: 4979: 5459: 4529: 712:, many named cubics pass through well-known points. Examples shown below use two kinds of homogeneous coordinates: 5158: 4863: 4420: 3977: 2759: 1686: 4655:
Cundy, H. M. & Parry, Cyril F. (2000), "Geometrical properties of some Euler and circular cubics (part 2)",
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Cundy, H. M. & Parry, Cyril F. (1999), "Geometrical properties of some Euler and circular cubics (part 1)",
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is the cevian triangle of some point (which lies on the Lucas cubic). Also, this cubic is the locus of a point
5305: 5226: 5216: 5153: 4903: 2387:{\displaystyle \sum _{\text{cyclic}}(2a^{2}(b^{2}+c^{2})+(b^{2}-c^{2})^{2}-3a^{4})x(c^{2}y^{2}-b^{2}z^{2})=0} 393: 1641:{\displaystyle \sum _{\text{cyclic}}(a^{2}(b^{2}+c^{2})+(b^{2}-c^{2})^{2}-2a^{4})x(c^{2}y^{2}-b^{2}z^{2})=0} 5123: 5019: 4503: 4481: 1655: 401: 5382: 5346: 5045: 4958: 17: 4827: 5356: 4994: 1033:
In the examples below, such equations are written more succinctly in "cyclic sum notation", like this:
5402: 2726:{\displaystyle \sum _{\text{cyclic}}(a^{2}(b^{2}+c^{2})+(b^{2}-c^{2})^{2})x(c^{2}y^{2}-b^{2}z^{2})=0} 5315: 5295: 5231: 5148: 5050: 5009: 4353: 5206: 5014: 4308: 124: 4419:
The 2nd equal areas cubic passes through the incenter, centroid, symmedian point, and points in
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for which it has a point defined. Elliptic curves are now normally studied in some variant of
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lecture in July 2016, ICMS, Edinburgh at conference in honour of Dusa McDuff's 70th birthday
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Cundy, H. M. & Parry, Cyril F. (1995), "Some cubic curves associated with a triangle",
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in Weierstrass form. There are many cubic curves that have no such point, for example when
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For a graphical representation and extensive list of properties of the Neuberg cubic, see
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Special Isocubics in the Triangle Plane (pdf), by Jean-Pierre Ehrmann and Bernard Gibert
5431: 5211: 5191: 5004: 4789: 4672: 4643: 4614: 4585: 4556: 4518: 1116: 555: 30:"Cubic curve" redirects here. For information on polynomial functions of degree 3, see 5163: 4819: 1767:, the Euler infinity point, other triangle centers, the excenters, the reflections of 5320: 5267: 4953: 4948: 4793: 4741: 4676: 4647: 4618: 4589: 4560: 4525: 723:
To convert from trilinear to barycentric in a cubic equation, substitute as follows:
536: 524: 4844:"Real and Complex Cubic Curves - John Milnor, Stony Brook University [2016]" 5310: 5196: 5173: 4781: 4664: 4635: 4606: 4577: 4548: 1764: 563: 466: 389: 362: 169: 5436: 5241: 5183: 5085: 4908: 4887: 4802: 4498: 3928:{\displaystyle \sum _{\text{cyclic}}a^{2}(b^{2}-c^{2})x(c^{2}y^{2}-b^{2}z^{2})=0} 3343:{\displaystyle \sum _{\text{cyclic}}(a^{4}-b^{2}c^{2})x(c^{2}y^{2}+b^{2}z^{2})=0} 1454:{\displaystyle \sum _{\text{cyclic}}(\cos {A}-2\cos {B}\cos {C})x(y^{2}-z^{2})=0} 544: 497: 458: 4837: 2197:{\displaystyle \sum _{\text{cyclic}}(\cos {A}-\cos {B}\cos {C})x(y^{2}-z^{2})=0} 562:(if a conic and a line), or up to three double points or a single triple point ( 5410: 5108: 4933: 4918: 4895: 4493: 550:
The singular points of an irreducible plane cubic curve are quite limited: one
532: 508: 478: 474: 349:{\displaystyle x^{3},y^{3},z^{3},x^{2}y,x^{2}z,y^{2}x,y^{2}z,z^{2}x,z^{2}y,xyz} 64: 31: 4843: 4463: 3987: 3668: 3412: 3055: 2780: 2459: 2045: 1789: 5488: 5451: 5221: 5201: 5128: 4923: 4855: 4684:
Ehrmann, Jean-Pierre & Gibert, Bernard (2001), "A Morley configuration",
4487: 1651: 501: 3638:{\displaystyle \sum _{\text{cyclic}}(b^{2}-c^{2})x(c^{2}y^{2}+b^{2}z^{2})=0} 1778:, and the vertices of the six equilateral triangles erected on the sides of 527:
made by extracting the square root of a cubic. This does depend on having a
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on the cubic but not on a sideline of the cubic, the isogonal conjugate of
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on the cubic but not on a sideline of the cubic, the isogonal conjugate of
1760: 1752: 551: 493: 173: 4258:{\displaystyle \sum _{\text{cyclic}}a(a^{2}-bc)x(c^{3}y^{2}-b^{3}z^{2})=0} 3047:
is the pedal triangle of some point; the point lies on the Darboux cubic.
407: 5262: 5100: 3217:{\displaystyle \sum _{\text{cyclic}}bc(a^{4}-b^{2}c^{2})x(y^{2}+z^{2})=0} 1756: 49: 3030:{\displaystyle \sum _{\text{cyclic}}(b^{2}+c^{2}-a^{2})x(y^{2}-z^{2})=0} 396:. If two cubics pass through a given set of nine points, then in fact a 5257: 4785: 4712:
Gibert, Bernard (2003), "Orthocorrespondence and orthopivotal cubics",
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Ehrmann, Jean-Pierre & Gibert, Bernard (2001), "The Simson cubic",
4668: 4639: 4610: 4581: 4552: 3685: 4832: 2921:{\displaystyle \sum _{\text{cyclic}}\cos(A)x(b^{2}y^{2}-c^{2}z^{2})=0} 1280:{\displaystyle X^{*}={\tfrac {1}{x}}:{\tfrac {1}{y}}:{\tfrac {1}{z}}.} 5118: 4726:
Kimberling, Clark (1998), "Triangle Centers and Central Triangles",
3522:{\displaystyle \sum _{\text{cyclic}}bc(b^{2}-c^{2})x(y^{2}+z^{2})=0} 3072: 4772:
Pinkernell, Guido M. (1996), "Cubic curves in the triangle plane",
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Lang, Fred (2002), "Geometry and group structures of some cubics",
3802:{\displaystyle \sum _{\text{cyclic}}a(b^{2}-c^{2})x(y^{2}-z^{2})=0} 1748: 188: 400:
of cubics does, and the points satisfy additional properties; see
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Cerin, Zvonko (1998), "Locus properties of the Neuberg cubic",
2062: 1990:{\displaystyle \sum _{\text{cyclic}}x(c^{2}y^{2}-b^{2}z^{2})=0} 1294: 1023:{\displaystyle f(a,b,c,x,y,z)+f(b,c,a,y,z,x)+f(c,a,b,z,x,y)=0.} 4520:
Conics and Cubics: A Concrete Introduction to Algebraic Curves
2555:{\displaystyle \sum _{\text{cyclic}}\cos(B-C)x(y^{2}-z^{2})=0} 2797: 477:. This can be shown by taking the homogeneous version of the 37: 4143:{\displaystyle (bz+cx)(cx+ay)(ay+bz)=(bx+cy)(cy+az)(az+bx)} 2436:
are perspective; the perspector lies on the Thomson cubic.
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These are ten in number; therefore the cubic curves form a
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The Neuberg cubic passes through the following points:
481:, which defines again a cubic, and intersecting it with 1903:{\displaystyle \sum _{\text{cyclic}}bcx(y^{2}-z^{2})=0} 1167:
analogously. Then the three reflected lines concur in
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The cubics listed below can be defined in terms of the
792:{\displaystyle x\to bcx,\quad y\to cay,\quad z\to abz;} 1814:
is on the cubic, such that the isogonal conjugate of
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respectively. The 1st Brocard cubic is the locus of
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The Napoleon–Feuerbach cubic is the locus of a point
2570: 2482: 2212: 2103: 1918: 1845: 1469: 1357: 1218: 1177: 1104:{\displaystyle \sum _{\text{cyclic}}f(x,y,z,a,b,c)=0} 1042: 881: 811: 732: 669: 628: 587: 201: 187:
is a non-zero linear combination of the third-degree
134: 77: 862:{\displaystyle x\to ax,\quad y\to by,\quad z\to cz.} 43:
Click the image to see information page for details.
392:; compare to two points determining a line and how 4807:(3rd ed.), Dublin: Hodges, Foster, and Figgis 4568:Cerin, Zvonko (1999), "On the cubic of Napoleon", 4517: 4390: 4342: 4297: 4257: 4142: 3937:The 1st equal areas cubic is the locus of a point 3927: 3801: 3637: 3521: 3359:be the 1st Brocard triangle. For arbitrary point 3342: 3216: 3029: 2920: 2725: 2554: 2386: 2196: 1989: 1902: 1640: 1453: 1279: 1204: 1103: 1022: 861: 791: 697: 656: 615: 348: 158: 110: 4742:"Cubics associated with triangles of equal areas" 504:, a line cuts this oval at, at most, two points. 5486: 492:The real points of cubic curves were studied by 4484:, on the intersection of two cubic plane curves 4885: 3647:The 2nd Brocard cubic is the locus of a point 802:to convert from barycentric to trilinear, use 4871: 4697: 4683: 4402:such that the area of the cevian triangle of 465:cubic curve is known to have nine points of 2471: 1149:about the internal angle bisector of angle 4878: 4864: 4771: 4739: 4725: 4654: 4625: 4596: 4409:equals the area of the cevian triangle of 4398:The 2nd equal areas cubic is the locus of 3945:equals the area of the cevian triangle of 3704:equals the area of the cevian triangle of 3095:is the first Brocard triangle of triangle 2396:The Darboux cubic is the locus of a point 1999:The Thomson cubic is the locus of a point 3941:such that area of the cevian triangle of 3700:such that area of the cevian triangle of 3999: 3684: 3680: 3110:are the first and second Brocard points. 3076:First Brocard Cubic: It is the locus of 3071: 3039:The Lucas cubic is the locus of a point 2796: 2061: 1810:Example of Thomson cubic (black curve). 1805: 1293: 872:Many equations for cubics have the form 485:; the intersections are then counted by 406: 36: 570:Cubic curves in the plane of a triangle 172:; or the inhomogeneous version for the 14: 5487: 5301:Clifford's theorem on special divisors 4850:. Graduate Mathematics. June 27, 2018. 4800: 4711: 2026:and the midpoints of the altitudes of 2022:the excenters, the midpoints of sides 507:A non-singular plane cubic defines an 4859: 4567: 4538: 2447:on the circumcircle. For each point 376:imposes a single linear condition on 4757: 3949:. Also, this cubic is the locus of 3424: 3067: 2816:is the pedal triangle of some point 2443:the excenters, and the antipodes of 2416:. Also, this cubic is the locus of 2081:are the feet of perpendiculars from 1689:). Also, this cubic is the locus of 4515: 4462:For a graphics and properties, see 3986:For a graphics and properties, see 3689:First equal area cubic of triangle 3667:For a graphics and properties, see 2779:For a graphics and properties, see 24: 5470:Vector bundles on algebraic curves 5393:Weber's theorem (Algebraic curves) 4990:Hasse's theorem on elliptic curves 4980:Counting points on elliptic curves 3378:be the intersections of the lines 25: 5506: 4813: 3411:For graphics and properties, see 3054:For graphics and properties, see 3043:such that the cevian triangle of 2812:such that the cevian triangle of 2458:For graphics and properties, see 4421:Encyclopedia of Triangle Centers 3978:Encyclopedia of Triangle Centers 2760:Encyclopedia of Triangle Centers 2428:such that the pedal triangle of 2420:such that the pedal triangle of 2057: 1801: 1687:Encyclopedia of Triangle Centers 1289: 1171:. In trilinear coordinates, if 517:Weierstrass's elliptic functions 426:. A parametrization is given by 5081:Hurwitz's automorphisms theorem 4820:A Catalog of Cubic Plane Curves 3651:for which the pole of the line 3102:, are collinear. In the figure 2432:and the anticevian triangle of 2044:For graphs and properties, see 843: 827: 770: 751: 581:is a triangle with sidelengths 365:of dimension 9, over any given 5306:Gonality of an algebraic curve 5217:Differential of the first kind 4246: 4200: 4194: 4172: 4137: 4119: 4116: 4098: 4095: 4077: 4071: 4053: 4050: 4032: 4029: 4011: 3916: 3870: 3864: 3838: 3790: 3764: 3758: 3732: 3626: 3580: 3574: 3548: 3510: 3484: 3478: 3452: 3331: 3285: 3279: 3243: 3205: 3179: 3173: 3137: 3018: 2992: 2986: 2947: 2909: 2863: 2857: 2851: 2792: 2714: 2668: 2662: 2653: 2626: 2620: 2594: 2581: 2543: 2517: 2511: 2499: 2375: 2329: 2323: 2298: 2271: 2265: 2239: 2223: 2185: 2159: 2153: 2114: 1978: 1932: 1891: 1865: 1629: 1583: 1577: 1552: 1525: 1519: 1493: 1480: 1442: 1416: 1410: 1368: 1092: 1056: 1011: 975: 966: 930: 921: 885: 847: 831: 815: 774: 755: 736: 688: 677: 647: 636: 606: 595: 153: 135: 99: 81: 13: 1: 5460:Birkhoff–Grothendieck theorem 5159:Nagata's conjecture on curves 5030:Schoof–Elkies–Atkin algorithm 4904:Five points determine a conic 4509: 1678:is the Euler infinity point ( 394:five points determine a conic 41:A selection of cubic curves. 5020:Supersingular elliptic curve 4833:Cubics in the Triangle Plane 4504:Catalogue of Triangle Cubics 4469:Cubics in the Triangle Plane 4391:{\displaystyle X_{Z}=z:x:y.} 3993:Cubics in the Triangle Plane 3674:Cubics in the Triangle Plane 3418:Cubics in the Triangle Plane 3061:Cubics in the Triangle Plane 2786:Cubics in the Triangle Plane 2465:Cubics in the Triangle Plane 2051:Cubics in the Triangle Plane 1795:Cubics in the Triangle Plane 1656:Joseph Jean Baptiste Neuberg 27:Type of a mathematical curve 7: 5227:Riemann's existence theorem 5154:Hilbert's sixteenth problem 5046:Elliptic curve cryptography 4959:Fundamental pair of periods 4736:. See Chapter 8 for cubics. 4475: 4343:{\displaystyle X_{Y}=y:z:x} 3655:in the circumconic through 2747:is the nine-point center, ( 10: 5511: 5357:Moduli of algebraic curves 4740:Kimberling, Clark (2001), 3080:such the intersections of 2824:lies on the Darboux cubic. 2066:Darboux cubic of triangle 1298:Neuberg cubic of triangle 1145:be the reflection of line 183:in such an equation. Here 111:{\displaystyle F(x,y,z)=0} 29: 5450: 5401: 5370: 5334: 5283: 5276: 5250: 5182: 5099: 5063: 5038: 4972: 4941: 4932: 4894: 453:, in which case it has a 449:A cubic curve may have a 5124:Cayley–Bacharach theorem 5051:Elliptic curve primality 4482:Cayley–Bacharach theorem 2801:Lucas Cubic of triangle 2472:Napoleon–Feuerbach cubic 1205:{\displaystyle X=x:y:z,} 402:Cayley–Bacharach theorem 5383:Riemann–Hurwitz formula 5347:Gromov–Witten invariant 5207:Compact Riemann surface 4995:Mazur's torsion theorem 4801:Salmon, George (1879), 4298:{\displaystyle X=x:y:z} 3965:is the Steiner point. ( 3696:: The locus of a point 2808:: The locus of a point 1693:such that the triangle 1324:are the reflections of 698:{\displaystyle c=|AB|.} 657:{\displaystyle b=|CA|,} 616:{\displaystyle a=|BC|,} 159:{\displaystyle (x:y:z)} 125:homogeneous coordinates 5000:Modular elliptic curve 4728:Congressus Numerantium 4524:, New York: Springer, 4392: 4344: 4299: 4259: 4144: 3929: 3811:Barycentric equation: 3803: 3709: 3639: 3531:Barycentric equation: 3523: 3344: 3226:Barycentric equation: 3218: 3111: 3031: 2930:Barycentric equation: 2922: 2825: 2727: 2564:Barycentric equation: 2556: 2455:is also on the cubic. 2388: 2206:Barycentric equation: 2198: 2094: 2041:is also on the cubic. 1991: 1912:Barycentric equation: 1904: 1836: 1642: 1463:Barycentric equation: 1455: 1348: 1281: 1206: 1105: 1024: 863: 793: 699: 658: 617: 535:, which serves as the 446: 350: 176:determined by setting 160: 112: 45: 4914:Rational normal curve 4490:, a cubic space curve 4393: 4345: 4300: 4260: 4152:Barycentric equation: 4145: 4000:2nd equal areas cubic 3930: 3804: 3688: 3681:1st equal areas cubic 3640: 3524: 3390:for which the points 3345: 3219: 3075: 3032: 2923: 2800: 2728: 2557: 2389: 2199: 2065: 1992: 1905: 1809: 1736:is the reflection of 1643: 1456: 1297: 1282: 1207: 1134:. A construction of 1127:not on a sideline of 1106: 1025: 864: 794: 700: 659: 618: 410: 351: 161: 113: 58:plane algebraic curve 40: 5465:Stable vector bundle 5326:Weil reciprocity law 5316:Riemann–Roch theorem 5296:Brill–Noether theory 5232:Riemann–Roch theorem 5149:Genus–degree formula 5010:Mordell–Weil theorem 4985:Division polynomials 4516:Bix, Robert (1998), 4459:(2053), and others. 4354: 4309: 4271: 4156: 4008: 4004:Trilinear equation: 3815: 3716: 3712:Trilinear equation: 3535: 3433: 3429:Trilinear equation: 3230: 3118: 2934: 2832: 2828:Trilinear equation: 2568: 2480: 2476:Trilinear equation: 2210: 2101: 1916: 1843: 1839:Trilinear equation: 1793:at Berhard Gibert's 1771:in the sidelines of 1467: 1355: 1351:Trilinear equation: 1216: 1175: 1040: 879: 809: 730: 667: 626: 585: 471:algebraically closed 199: 132: 75: 5277:Structure of curves 5169:Quartic plane curve 5091:Hyperelliptic curve 5071:De Franchis theorem 5015:Nagell–Lutz theorem 4804:Higher Plane Curves 4774:Journal of Geometry 4760:Forum Geometricorum 4746:Forum Geometricorum 4714:Forum Geometricorum 4700:Forum Geometricorum 4686:Forum Geometricorum 4657:Journal of Geometry 4628:Journal of Geometry 4599:Journal of Geometry 4570:Journal of Geometry 4541:Journal of Geometry 3382:with the sidelines 3114:Trilinear equation: 3084:with the sidelines 2414:de Longchamps point 2097:Trilinear equation: 521:quadratic extension 5284:Divisors on curves 5076:Faltings's theorem 5025:Schoof's algorithm 5005:Modularity theorem 4823:(archived version) 4786:10.1007/BF01223040 4669:10.1007/BF01221061 4640:10.1007/BF01225673 4611:10.1007/BF01224039 4582:10.1007/BF01225672 4553:10.1007/BF01221237 4388: 4340: 4305:(trilinears), let 4295: 4255: 4168: 4140: 3925: 3827: 3799: 3728: 3710: 3635: 3547: 3519: 3445: 3340: 3242: 3214: 3130: 3112: 3027: 2946: 2918: 2844: 2826: 2723: 2580: 2552: 2492: 2384: 2222: 2194: 2113: 2095: 2033:. For each point 1987: 1928: 1900: 1855: 1837: 1711:is perspective to 1638: 1479: 1451: 1367: 1349: 1277: 1272: 1257: 1242: 1202: 1117:isogonal conjugate 1101: 1052: 1020: 859: 789: 695: 654: 613: 566:) if three lines. 525:rational functions 473:field such as the 447: 346: 156: 108: 46: 5482: 5481: 5478: 5477: 5378:Hasse–Witt matrix 5321:Weierstrass point 5268:Smooth completion 5237:TeichmĂĽller space 5139:Cubic plane curve 5059: 5058: 4973:Arithmetic theory 4954:Elliptic integral 4949:Elliptic function 4166: 4159: 3825: 3818: 3726: 3719: 3545: 3538: 3443: 3436: 3425:2nd Brocard cubic 3240: 3233: 3128: 3121: 3068:1st Brocard cubic 2944: 2937: 2842: 2835: 2578: 2571: 2490: 2483: 2220: 2213: 2111: 2104: 2085:to the sidelines 2015:is the centroid. 1926: 1919: 1853: 1846: 1765:isodynamic points 1477: 1470: 1365: 1358: 1332:, then the lines 1328:in the sidelines 1271: 1256: 1241: 1050: 1043: 537:point at infinity 511:, over any field 380:, if we ask that 54:cubic plane curve 16:(Redirected from 5502: 5311:Jacobian variety 5281: 5280: 5184:Riemann surfaces 5174:Real plane curve 5134:Cramer's paradox 5114:BĂ©zout's theorem 4939: 4938: 4888:algebraic curves 4880: 4873: 4866: 4857: 4856: 4851: 4828:Points on Cubics 4808: 4796: 4780:(1–2): 142–161, 4767: 4753: 4735: 4721: 4707: 4693: 4679: 4650: 4621: 4592: 4563: 4534: 4523: 4415: 4408: 4401: 4397: 4395: 4394: 4389: 4366: 4365: 4349: 4347: 4346: 4341: 4321: 4320: 4304: 4302: 4301: 4296: 4264: 4262: 4261: 4256: 4245: 4244: 4235: 4234: 4222: 4221: 4212: 4211: 4184: 4183: 4167: 4164: 4149: 4147: 4146: 4141: 3975: 3964: 3960: 3956: 3952: 3948: 3944: 3940: 3934: 3932: 3931: 3926: 3915: 3914: 3905: 3904: 3892: 3891: 3882: 3881: 3863: 3862: 3850: 3849: 3837: 3836: 3826: 3823: 3808: 3806: 3805: 3800: 3789: 3788: 3776: 3775: 3757: 3756: 3744: 3743: 3727: 3724: 3707: 3703: 3699: 3695: 3662: 3658: 3654: 3650: 3644: 3642: 3641: 3636: 3625: 3624: 3615: 3614: 3602: 3601: 3592: 3591: 3573: 3572: 3560: 3559: 3546: 3543: 3528: 3526: 3525: 3520: 3509: 3508: 3496: 3495: 3477: 3476: 3464: 3463: 3444: 3441: 3404: 3389: 3385: 3381: 3377: 3362: 3358: 3349: 3347: 3346: 3341: 3330: 3329: 3320: 3319: 3307: 3306: 3297: 3296: 3278: 3277: 3268: 3267: 3255: 3254: 3241: 3238: 3223: 3221: 3220: 3215: 3204: 3203: 3191: 3190: 3172: 3171: 3162: 3161: 3149: 3148: 3129: 3126: 3109: 3105: 3101: 3094: 3087: 3083: 3079: 3046: 3042: 3036: 3034: 3033: 3028: 3017: 3016: 3004: 3003: 2985: 2984: 2972: 2971: 2959: 2958: 2945: 2942: 2927: 2925: 2924: 2919: 2908: 2907: 2898: 2897: 2885: 2884: 2875: 2874: 2843: 2840: 2823: 2819: 2815: 2811: 2807: 2775: 2768: 2757: 2746: 2742: 2738: 2732: 2730: 2729: 2724: 2713: 2712: 2703: 2702: 2690: 2689: 2680: 2679: 2661: 2660: 2651: 2650: 2638: 2637: 2619: 2618: 2606: 2605: 2593: 2592: 2579: 2576: 2561: 2559: 2558: 2553: 2542: 2541: 2529: 2528: 2491: 2488: 2454: 2450: 2446: 2442: 2435: 2431: 2427: 2423: 2419: 2411: 2407: 2403: 2399: 2393: 2391: 2390: 2385: 2374: 2373: 2364: 2363: 2351: 2350: 2341: 2340: 2322: 2321: 2306: 2305: 2296: 2295: 2283: 2282: 2264: 2263: 2251: 2250: 2238: 2237: 2221: 2218: 2203: 2201: 2200: 2195: 2184: 2183: 2171: 2170: 2152: 2141: 2127: 2112: 2109: 2092: 2088: 2084: 2080: 2076: 2072: 2040: 2036: 2032: 2025: 2021: 2014: 2010: 2006: 2002: 1996: 1994: 1993: 1988: 1977: 1976: 1967: 1966: 1954: 1953: 1944: 1943: 1927: 1924: 1909: 1907: 1906: 1901: 1890: 1889: 1877: 1876: 1854: 1851: 1834: 1824: 1813: 1784: 1777: 1770: 1743: 1739: 1735: 1717: 1710: 1692: 1684: 1677: 1673: 1669: 1665: 1647: 1645: 1644: 1639: 1628: 1627: 1618: 1617: 1605: 1604: 1595: 1594: 1576: 1575: 1560: 1559: 1550: 1549: 1537: 1536: 1518: 1517: 1505: 1504: 1492: 1491: 1478: 1475: 1460: 1458: 1457: 1452: 1441: 1440: 1428: 1427: 1409: 1398: 1381: 1366: 1363: 1346: 1331: 1327: 1323: 1308: 1304: 1286: 1284: 1283: 1278: 1273: 1264: 1258: 1249: 1243: 1234: 1228: 1227: 1211: 1209: 1208: 1203: 1170: 1166: 1159: 1152: 1148: 1144: 1137: 1133: 1126: 1122: 1110: 1108: 1107: 1102: 1051: 1048: 1029: 1027: 1026: 1021: 868: 866: 865: 860: 798: 796: 795: 790: 711: 704: 702: 701: 696: 691: 680: 663: 661: 660: 655: 650: 639: 622: 620: 619: 614: 609: 598: 580: 564:concurrent lines 542: 530: 523:of the field of 514: 487:BĂ©zout's theorem 484: 444: 425: 390:general position 387: 383: 379: 375: 371: 363:projective space 357: 355: 353: 352: 347: 330: 329: 314: 313: 298: 297: 282: 281: 266: 265: 250: 249: 237: 236: 224: 223: 211: 210: 186: 182: 170:projective plane 167: 165: 163: 162: 157: 119: 117: 115: 114: 109: 62: 44: 21: 5510: 5509: 5505: 5504: 5503: 5501: 5500: 5499: 5485: 5484: 5483: 5474: 5446: 5437:Delta invariant 5415: 5397: 5366: 5330: 5291:Abel–Jacobi map 5272: 5246: 5242:Torelli theorem 5212:Dessin d'enfant 5192:Belyi's theorem 5178: 5164:PlĂĽcker formula 5095: 5086:Hurwitz surface 5055: 5034: 4968: 4942:Analytic theory 4934:Elliptic curves 4928: 4909:Projective line 4896:Rational curves 4890: 4884: 4842: 4816: 4634:(1–2): 72–103, 4532: 4512: 4499:Witch of Agnesi 4478: 4414: 4410: 4407: 4403: 4399: 4361: 4357: 4355: 4352: 4351: 4316: 4312: 4310: 4307: 4306: 4272: 4269: 4268: 4240: 4236: 4230: 4226: 4217: 4213: 4207: 4203: 4179: 4175: 4163: 4157: 4154: 4153: 4009: 4006: 4005: 4002: 3966: 3962: 3958: 3957:is on the line 3954: 3950: 3946: 3942: 3938: 3910: 3906: 3900: 3896: 3887: 3883: 3877: 3873: 3858: 3854: 3845: 3841: 3832: 3828: 3822: 3816: 3813: 3812: 3784: 3780: 3771: 3767: 3752: 3748: 3739: 3735: 3723: 3717: 3714: 3713: 3705: 3701: 3697: 3690: 3683: 3660: 3656: 3652: 3648: 3620: 3616: 3610: 3606: 3597: 3593: 3587: 3583: 3568: 3564: 3555: 3551: 3542: 3536: 3533: 3532: 3504: 3500: 3491: 3487: 3472: 3468: 3459: 3455: 3440: 3434: 3431: 3430: 3427: 3405:are collinear. 3403: 3399: 3395: 3391: 3387: 3383: 3379: 3376: 3372: 3368: 3364: 3360: 3353: 3325: 3321: 3315: 3311: 3302: 3298: 3292: 3288: 3273: 3269: 3263: 3259: 3250: 3246: 3237: 3231: 3228: 3227: 3199: 3195: 3186: 3182: 3167: 3163: 3157: 3153: 3144: 3140: 3125: 3119: 3116: 3115: 3107: 3103: 3096: 3089: 3085: 3081: 3077: 3070: 3044: 3040: 3012: 3008: 2999: 2995: 2980: 2976: 2967: 2963: 2954: 2950: 2941: 2935: 2932: 2931: 2903: 2899: 2893: 2889: 2880: 2876: 2870: 2866: 2839: 2833: 2830: 2829: 2821: 2817: 2813: 2809: 2802: 2795: 2770: 2766: 2748: 2744: 2740: 2739:is on the line 2736: 2708: 2704: 2698: 2694: 2685: 2681: 2675: 2671: 2656: 2652: 2646: 2642: 2633: 2629: 2614: 2610: 2601: 2597: 2588: 2584: 2575: 2569: 2566: 2565: 2537: 2533: 2524: 2520: 2487: 2481: 2478: 2477: 2474: 2452: 2448: 2444: 2440: 2433: 2429: 2425: 2421: 2417: 2409: 2405: 2404:is on the line 2401: 2397: 2369: 2365: 2359: 2355: 2346: 2342: 2336: 2332: 2317: 2313: 2301: 2297: 2291: 2287: 2278: 2274: 2259: 2255: 2246: 2242: 2233: 2229: 2217: 2211: 2208: 2207: 2179: 2175: 2166: 2162: 2148: 2137: 2123: 2108: 2102: 2099: 2098: 2093:are concurrent. 2090: 2089:then the lines 2086: 2082: 2078: 2074: 2073:: The locus of 2067: 2060: 2038: 2034: 2027: 2023: 2019: 2012: 2008: 2007:is on the line 2004: 2000: 1972: 1968: 1962: 1958: 1949: 1945: 1939: 1935: 1923: 1917: 1914: 1913: 1885: 1881: 1872: 1868: 1850: 1844: 1841: 1840: 1826: 1825:is on the line 1815: 1811: 1804: 1779: 1772: 1768: 1741: 1737: 1733: 1729: 1725: 1719: 1712: 1708: 1704: 1700: 1694: 1690: 1679: 1675: 1671: 1670:is on the line 1667: 1663: 1623: 1619: 1613: 1609: 1600: 1596: 1590: 1586: 1571: 1567: 1555: 1551: 1545: 1541: 1532: 1528: 1513: 1509: 1500: 1496: 1487: 1483: 1474: 1468: 1465: 1464: 1436: 1432: 1423: 1419: 1405: 1394: 1377: 1362: 1356: 1353: 1352: 1347:are concurrent. 1345: 1341: 1337: 1333: 1329: 1325: 1322: 1318: 1314: 1310: 1306: 1305:: The locus of 1299: 1292: 1262: 1247: 1232: 1223: 1219: 1217: 1214: 1213: 1176: 1173: 1172: 1168: 1165: 1161: 1158: 1154: 1150: 1146: 1143: 1139: 1135: 1128: 1124: 1120: 1047: 1041: 1038: 1037: 880: 877: 876: 810: 807: 806: 731: 728: 727: 706: 687: 676: 668: 665: 664: 646: 635: 627: 624: 623: 605: 594: 586: 583: 582: 575: 572: 545:rational number 540: 528: 512: 498:Euclidean plane 482: 475:complex numbers 459:projective line 455:parametrization 427: 412: 411:Singular cubic 385: 381: 377: 373: 369: 325: 321: 309: 305: 293: 289: 277: 273: 261: 257: 245: 241: 232: 228: 219: 215: 206: 202: 200: 197: 196: 194: 184: 177: 133: 130: 129: 127: 76: 73: 72: 70: 60: 42: 35: 28: 23: 22: 15: 12: 11: 5: 5508: 5498: 5497: 5480: 5479: 5476: 5475: 5473: 5472: 5467: 5462: 5456: 5454: 5452:Vector bundles 5448: 5447: 5445: 5444: 5439: 5434: 5429: 5424: 5419: 5413: 5407: 5405: 5399: 5398: 5396: 5395: 5390: 5385: 5380: 5374: 5372: 5368: 5367: 5365: 5364: 5359: 5354: 5349: 5344: 5338: 5336: 5332: 5331: 5329: 5328: 5323: 5318: 5313: 5308: 5303: 5298: 5293: 5287: 5285: 5278: 5274: 5273: 5271: 5270: 5265: 5260: 5254: 5252: 5248: 5247: 5245: 5244: 5239: 5234: 5229: 5224: 5219: 5214: 5209: 5204: 5199: 5194: 5188: 5186: 5180: 5179: 5177: 5176: 5171: 5166: 5161: 5156: 5151: 5146: 5141: 5136: 5131: 5126: 5121: 5116: 5111: 5105: 5103: 5097: 5096: 5094: 5093: 5088: 5083: 5078: 5073: 5067: 5065: 5061: 5060: 5057: 5056: 5054: 5053: 5048: 5042: 5040: 5036: 5035: 5033: 5032: 5027: 5022: 5017: 5012: 5007: 5002: 4997: 4992: 4987: 4982: 4976: 4974: 4970: 4969: 4967: 4966: 4961: 4956: 4951: 4945: 4943: 4936: 4930: 4929: 4927: 4926: 4921: 4919:Riemann sphere 4916: 4911: 4906: 4900: 4898: 4892: 4891: 4883: 4882: 4875: 4868: 4860: 4854: 4853: 4840: 4835: 4830: 4825: 4815: 4814:External links 4812: 4811: 4810: 4798: 4769: 4755: 4737: 4723: 4709: 4695: 4681: 4663:(1–2): 58–75, 4652: 4623: 4605:(1–2): 41–66, 4594: 4576:(1–2): 55–71, 4565: 4547:(1–2): 39–56, 4536: 4530: 4511: 4508: 4507: 4506: 4501: 4496: 4494:Elliptic curve 4491: 4485: 4477: 4474: 4412: 4405: 4387: 4384: 4381: 4378: 4375: 4372: 4369: 4364: 4360: 4339: 4336: 4333: 4330: 4327: 4324: 4319: 4315: 4294: 4291: 4288: 4285: 4282: 4279: 4276: 4267:For any point 4254: 4251: 4248: 4243: 4239: 4233: 4229: 4225: 4220: 4216: 4210: 4206: 4202: 4199: 4196: 4193: 4190: 4187: 4182: 4178: 4174: 4171: 4162: 4139: 4136: 4133: 4130: 4127: 4124: 4121: 4118: 4115: 4112: 4109: 4106: 4103: 4100: 4097: 4094: 4091: 4088: 4085: 4082: 4079: 4076: 4073: 4070: 4067: 4064: 4061: 4058: 4055: 4052: 4049: 4046: 4043: 4040: 4037: 4034: 4031: 4028: 4025: 4022: 4019: 4016: 4013: 4001: 3998: 3924: 3921: 3918: 3913: 3909: 3903: 3899: 3895: 3890: 3886: 3880: 3876: 3872: 3869: 3866: 3861: 3857: 3853: 3848: 3844: 3840: 3835: 3831: 3821: 3798: 3795: 3792: 3787: 3783: 3779: 3774: 3770: 3766: 3763: 3760: 3755: 3751: 3747: 3742: 3738: 3734: 3731: 3722: 3682: 3679: 3634: 3631: 3628: 3623: 3619: 3613: 3609: 3605: 3600: 3596: 3590: 3586: 3582: 3579: 3576: 3571: 3567: 3563: 3558: 3554: 3550: 3541: 3518: 3515: 3512: 3507: 3503: 3499: 3494: 3490: 3486: 3483: 3480: 3475: 3471: 3467: 3462: 3458: 3454: 3451: 3448: 3439: 3426: 3423: 3401: 3397: 3393: 3374: 3370: 3366: 3339: 3336: 3333: 3328: 3324: 3318: 3314: 3310: 3305: 3301: 3295: 3291: 3287: 3284: 3281: 3276: 3272: 3266: 3262: 3258: 3253: 3249: 3245: 3236: 3213: 3210: 3207: 3202: 3198: 3194: 3189: 3185: 3181: 3178: 3175: 3170: 3166: 3160: 3156: 3152: 3147: 3143: 3139: 3136: 3133: 3124: 3069: 3066: 3026: 3023: 3020: 3015: 3011: 3007: 3002: 2998: 2994: 2991: 2988: 2983: 2979: 2975: 2970: 2966: 2962: 2957: 2953: 2949: 2940: 2917: 2914: 2911: 2906: 2902: 2896: 2892: 2888: 2883: 2879: 2873: 2869: 2865: 2862: 2859: 2856: 2853: 2850: 2847: 2838: 2794: 2791: 2722: 2719: 2716: 2711: 2707: 2701: 2697: 2693: 2688: 2684: 2678: 2674: 2670: 2667: 2664: 2659: 2655: 2649: 2645: 2641: 2636: 2632: 2628: 2625: 2622: 2617: 2613: 2609: 2604: 2600: 2596: 2591: 2587: 2583: 2574: 2551: 2548: 2545: 2540: 2536: 2532: 2527: 2523: 2519: 2516: 2513: 2510: 2507: 2504: 2501: 2498: 2495: 2486: 2473: 2470: 2383: 2380: 2377: 2372: 2368: 2362: 2358: 2354: 2349: 2345: 2339: 2335: 2331: 2328: 2325: 2320: 2316: 2312: 2309: 2304: 2300: 2294: 2290: 2286: 2281: 2277: 2273: 2270: 2267: 2262: 2258: 2254: 2249: 2245: 2241: 2236: 2232: 2228: 2225: 2216: 2193: 2190: 2187: 2182: 2178: 2174: 2169: 2165: 2161: 2158: 2155: 2151: 2147: 2144: 2140: 2136: 2133: 2130: 2126: 2122: 2119: 2116: 2107: 2059: 2056: 1986: 1983: 1980: 1975: 1971: 1965: 1961: 1957: 1952: 1948: 1942: 1938: 1934: 1931: 1922: 1899: 1896: 1893: 1888: 1884: 1880: 1875: 1871: 1867: 1864: 1861: 1858: 1849: 1803: 1800: 1731: 1727: 1723: 1706: 1702: 1698: 1637: 1634: 1631: 1626: 1622: 1616: 1612: 1608: 1603: 1599: 1593: 1589: 1585: 1582: 1579: 1574: 1570: 1566: 1563: 1558: 1554: 1548: 1544: 1540: 1535: 1531: 1527: 1524: 1521: 1516: 1512: 1508: 1503: 1499: 1495: 1490: 1486: 1482: 1473: 1450: 1447: 1444: 1439: 1435: 1431: 1426: 1422: 1418: 1415: 1412: 1408: 1404: 1401: 1397: 1393: 1390: 1387: 1384: 1380: 1376: 1373: 1370: 1361: 1343: 1339: 1335: 1320: 1316: 1312: 1309:such that, if 1291: 1288: 1276: 1270: 1267: 1261: 1255: 1252: 1246: 1240: 1237: 1231: 1226: 1222: 1201: 1198: 1195: 1192: 1189: 1186: 1183: 1180: 1163: 1156: 1141: 1138:follows. Let 1113: 1112: 1100: 1097: 1094: 1091: 1088: 1085: 1082: 1079: 1076: 1073: 1070: 1067: 1064: 1061: 1058: 1055: 1046: 1031: 1030: 1019: 1016: 1013: 1010: 1007: 1004: 1001: 998: 995: 992: 989: 986: 983: 980: 977: 974: 971: 968: 965: 962: 959: 956: 953: 950: 947: 944: 941: 938: 935: 932: 929: 926: 923: 920: 917: 914: 911: 908: 905: 902: 899: 896: 893: 890: 887: 884: 870: 869: 858: 855: 852: 849: 846: 842: 839: 836: 833: 830: 826: 823: 820: 817: 814: 800: 799: 788: 785: 782: 779: 776: 773: 769: 766: 763: 760: 757: 754: 750: 747: 744: 741: 738: 735: 694: 690: 686: 683: 679: 675: 672: 653: 649: 645: 642: 638: 634: 631: 612: 608: 604: 601: 597: 593: 590: 571: 568: 533:rational point 509:elliptic curve 502:conic sections 479:Hessian matrix 461:. Otherwise a 457:in terms of a 451:singular point 359: 358: 345: 342: 339: 336: 333: 328: 324: 320: 317: 312: 308: 304: 301: 296: 292: 288: 285: 280: 276: 272: 269: 264: 260: 256: 253: 248: 244: 240: 235: 231: 227: 222: 218: 214: 209: 205: 155: 152: 149: 146: 143: 140: 137: 121: 120: 107: 104: 101: 98: 95: 92: 89: 86: 83: 80: 65:cubic equation 32:Cubic function 26: 9: 6: 4: 3: 2: 5507: 5496: 5493: 5492: 5490: 5471: 5468: 5466: 5463: 5461: 5458: 5457: 5455: 5453: 5449: 5443: 5440: 5438: 5435: 5433: 5430: 5428: 5425: 5423: 5420: 5418: 5416: 5409: 5408: 5406: 5404: 5403:Singularities 5400: 5394: 5391: 5389: 5386: 5384: 5381: 5379: 5376: 5375: 5373: 5369: 5363: 5360: 5358: 5355: 5353: 5350: 5348: 5345: 5343: 5340: 5339: 5337: 5333: 5327: 5324: 5322: 5319: 5317: 5314: 5312: 5309: 5307: 5304: 5302: 5299: 5297: 5294: 5292: 5289: 5288: 5286: 5282: 5279: 5275: 5269: 5266: 5264: 5261: 5259: 5256: 5255: 5253: 5251:Constructions 5249: 5243: 5240: 5238: 5235: 5233: 5230: 5228: 5225: 5223: 5222:Klein quartic 5220: 5218: 5215: 5213: 5210: 5208: 5205: 5203: 5202:Bolza surface 5200: 5198: 5197:Bring's curve 5195: 5193: 5190: 5189: 5187: 5185: 5181: 5175: 5172: 5170: 5167: 5165: 5162: 5160: 5157: 5155: 5152: 5150: 5147: 5145: 5142: 5140: 5137: 5135: 5132: 5130: 5129:Conic section 5127: 5125: 5122: 5120: 5117: 5115: 5112: 5110: 5109:AF+BG theorem 5107: 5106: 5104: 5102: 5098: 5092: 5089: 5087: 5084: 5082: 5079: 5077: 5074: 5072: 5069: 5068: 5066: 5062: 5052: 5049: 5047: 5044: 5043: 5041: 5037: 5031: 5028: 5026: 5023: 5021: 5018: 5016: 5013: 5011: 5008: 5006: 5003: 5001: 4998: 4996: 4993: 4991: 4988: 4986: 4983: 4981: 4978: 4977: 4975: 4971: 4965: 4962: 4960: 4957: 4955: 4952: 4950: 4947: 4946: 4944: 4940: 4937: 4935: 4931: 4925: 4924:Twisted cubic 4922: 4920: 4917: 4915: 4912: 4910: 4907: 4905: 4902: 4901: 4899: 4897: 4893: 4889: 4881: 4876: 4874: 4869: 4867: 4862: 4861: 4858: 4849: 4845: 4841: 4839: 4836: 4834: 4831: 4829: 4826: 4824: 4821: 4818: 4817: 4806: 4805: 4799: 4795: 4791: 4787: 4783: 4779: 4775: 4770: 4765: 4761: 4756: 4751: 4747: 4743: 4738: 4733: 4729: 4724: 4719: 4715: 4710: 4705: 4701: 4696: 4691: 4687: 4682: 4678: 4674: 4670: 4666: 4662: 4658: 4653: 4649: 4645: 4641: 4637: 4633: 4629: 4624: 4620: 4616: 4612: 4608: 4604: 4600: 4595: 4591: 4587: 4583: 4579: 4575: 4571: 4566: 4562: 4558: 4554: 4550: 4546: 4542: 4537: 4533: 4531:0-387-98401-1 4527: 4522: 4521: 4514: 4513: 4505: 4502: 4500: 4497: 4495: 4492: 4489: 4488:Twisted cubic 4486: 4483: 4480: 4479: 4473: 4471: 4470: 4466: 4460: 4458: 4454: 4450: 4446: 4442: 4438: 4434: 4430: 4426: 4422: 4417: 4385: 4382: 4379: 4376: 4373: 4370: 4367: 4362: 4358: 4337: 4334: 4331: 4328: 4325: 4322: 4317: 4313: 4292: 4289: 4286: 4283: 4280: 4277: 4274: 4265: 4252: 4249: 4241: 4237: 4231: 4227: 4223: 4218: 4214: 4208: 4204: 4197: 4191: 4188: 4185: 4180: 4176: 4169: 4160: 4150: 4134: 4131: 4128: 4125: 4122: 4113: 4110: 4107: 4104: 4101: 4092: 4089: 4086: 4083: 4080: 4074: 4068: 4065: 4062: 4059: 4056: 4047: 4044: 4041: 4038: 4035: 4026: 4023: 4020: 4017: 4014: 3997: 3995: 3994: 3990: 3984: 3981: 3979: 3973: 3969: 3935: 3922: 3919: 3911: 3907: 3901: 3897: 3893: 3888: 3884: 3878: 3874: 3867: 3859: 3855: 3851: 3846: 3842: 3833: 3829: 3819: 3809: 3796: 3793: 3785: 3781: 3777: 3772: 3768: 3761: 3753: 3749: 3745: 3740: 3736: 3729: 3720: 3694: 3687: 3678: 3676: 3675: 3671: 3665: 3645: 3632: 3629: 3621: 3617: 3611: 3607: 3603: 3598: 3594: 3588: 3584: 3577: 3569: 3565: 3561: 3556: 3552: 3539: 3529: 3516: 3513: 3505: 3501: 3497: 3492: 3488: 3481: 3473: 3469: 3465: 3460: 3456: 3449: 3446: 3437: 3422: 3420: 3419: 3415: 3409: 3406: 3380:XA′, XB′, XC′ 3357: 3350: 3337: 3334: 3326: 3322: 3316: 3312: 3308: 3303: 3299: 3293: 3289: 3282: 3274: 3270: 3264: 3260: 3256: 3251: 3247: 3234: 3224: 3211: 3208: 3200: 3196: 3192: 3187: 3183: 3176: 3168: 3164: 3158: 3154: 3150: 3145: 3141: 3134: 3131: 3122: 3100: 3093: 3082:XA', XB', XC' 3074: 3065: 3063: 3062: 3058: 3052: 3048: 3037: 3024: 3021: 3013: 3009: 3005: 3000: 2996: 2989: 2981: 2977: 2973: 2968: 2964: 2960: 2955: 2951: 2938: 2928: 2915: 2912: 2904: 2900: 2894: 2890: 2886: 2881: 2877: 2871: 2867: 2860: 2854: 2848: 2845: 2836: 2806: 2799: 2790: 2788: 2787: 2783: 2777: 2774: 2763: 2761: 2755: 2751: 2733: 2720: 2717: 2709: 2705: 2699: 2695: 2691: 2686: 2682: 2676: 2672: 2665: 2657: 2647: 2643: 2639: 2634: 2630: 2623: 2615: 2611: 2607: 2602: 2598: 2589: 2585: 2572: 2562: 2549: 2546: 2538: 2534: 2530: 2525: 2521: 2514: 2508: 2505: 2502: 2496: 2493: 2484: 2469: 2467: 2466: 2462: 2456: 2437: 2415: 2394: 2381: 2378: 2370: 2366: 2360: 2356: 2352: 2347: 2343: 2337: 2333: 2326: 2318: 2314: 2310: 2307: 2302: 2292: 2288: 2284: 2279: 2275: 2268: 2260: 2256: 2252: 2247: 2243: 2234: 2230: 2226: 2214: 2204: 2191: 2188: 2180: 2176: 2172: 2167: 2163: 2156: 2149: 2145: 2142: 2138: 2134: 2131: 2128: 2124: 2120: 2117: 2105: 2077:such that if 2071: 2064: 2058:Darboux cubic 2055: 2053: 2052: 2048: 2042: 2031: 2016: 1997: 1984: 1981: 1973: 1969: 1963: 1959: 1955: 1950: 1946: 1940: 1936: 1929: 1920: 1910: 1897: 1894: 1886: 1882: 1878: 1873: 1869: 1862: 1859: 1856: 1847: 1833: 1829: 1822: 1818: 1808: 1802:Thomson cubic 1799: 1797: 1796: 1792: 1786: 1783: 1776: 1766: 1762: 1761:Fermat points 1758: 1754: 1750: 1745: 1744:respectively 1740:in the lines 1734: 1716: 1709: 1688: 1682: 1661: 1657: 1654:(named after 1653: 1652:Neuberg cubic 1648: 1635: 1632: 1624: 1620: 1614: 1610: 1606: 1601: 1597: 1591: 1587: 1580: 1572: 1568: 1564: 1561: 1556: 1546: 1542: 1538: 1533: 1529: 1522: 1514: 1510: 1506: 1501: 1497: 1488: 1484: 1471: 1461: 1448: 1445: 1437: 1433: 1429: 1424: 1420: 1413: 1406: 1402: 1399: 1395: 1391: 1388: 1385: 1382: 1378: 1374: 1371: 1359: 1303: 1296: 1290:Neuberg cubic 1287: 1274: 1268: 1265: 1259: 1253: 1250: 1244: 1238: 1235: 1229: 1224: 1220: 1199: 1196: 1193: 1190: 1187: 1184: 1181: 1178: 1153:, and define 1132: 1123:, of a point 1119:, denoted by 1118: 1098: 1095: 1089: 1086: 1083: 1080: 1077: 1074: 1071: 1068: 1065: 1062: 1059: 1053: 1044: 1036: 1035: 1034: 1017: 1014: 1008: 1005: 1002: 999: 996: 993: 990: 987: 984: 981: 978: 972: 969: 963: 960: 957: 954: 951: 948: 945: 942: 939: 936: 933: 927: 924: 918: 915: 912: 909: 906: 903: 900: 897: 894: 891: 888: 882: 875: 874: 873: 856: 853: 850: 844: 840: 837: 834: 828: 824: 821: 818: 812: 805: 804: 803: 786: 783: 780: 777: 771: 767: 764: 761: 758: 752: 748: 745: 742: 739: 733: 726: 725: 724: 721: 719: 715: 710: 692: 684: 681: 673: 670: 651: 643: 640: 632: 629: 610: 602: 599: 591: 588: 579: 574:Suppose that 567: 565: 561: 557: 553: 548: 546: 538: 534: 526: 522: 519:, defining a 518: 510: 505: 503: 499: 495: 490: 488: 480: 476: 472: 468: 464: 460: 456: 452: 442: 438: 434: 430: 423: 419: 415: 409: 405: 403: 399: 395: 391: 384:pass through 372:. Each point 368: 364: 343: 340: 337: 334: 331: 326: 322: 318: 315: 310: 306: 302: 299: 294: 290: 286: 283: 278: 274: 270: 267: 262: 258: 254: 251: 246: 242: 238: 233: 229: 225: 220: 216: 212: 207: 203: 193: 192: 191: 190: 180: 175: 171: 150: 147: 144: 141: 138: 126: 105: 102: 96: 93: 90: 87: 84: 78: 69: 68: 67: 66: 63:defined by a 59: 55: 51: 39: 33: 19: 5495:Cubic curves 5411: 5388:Prym variety 5362:Stable curve 5352:Hodge bundle 5342:ELSV formula 5144:Fermat curve 5138: 5101:Plane curves 5064:Higher genus 5039:Applications 4964:Modular form 4847: 4803: 4777: 4773: 4763: 4759: 4749: 4745: 4731: 4727: 4717: 4713: 4703: 4699: 4689: 4685: 4660: 4656: 4631: 4627: 4602: 4598: 4573: 4569: 4544: 4540: 4519: 4468: 4464: 4461: 4456: 4452: 4448: 4444: 4440: 4436: 4432: 4428: 4424: 4418: 4266: 4151: 4003: 3992: 3988: 3985: 3982: 3971: 3967: 3936: 3810: 3711: 3692: 3673: 3669: 3666: 3646: 3530: 3428: 3417: 3413: 3410: 3407: 3355: 3351: 3225: 3113: 3098: 3091: 3060: 3056: 3053: 3049: 3038: 2929: 2827: 2820:; the point 2804: 2785: 2781: 2778: 2772: 2764: 2753: 2749: 2734: 2563: 2475: 2464: 2460: 2457: 2438: 2395: 2205: 2096: 2069: 2050: 2046: 2043: 2029: 2017: 1998: 1911: 1838: 1831: 1827: 1820: 1816: 1794: 1790: 1787: 1781: 1774: 1753:circumcenter 1746: 1721: 1714: 1696: 1680: 1649: 1462: 1350: 1301: 1130: 1114: 1032: 871: 801: 722: 708: 705:Relative to 577: 573: 552:double point 549: 506: 494:Isaac Newton 491: 463:non-singular 462: 448: 440: 436: 432: 428: 421: 417: 413: 360: 178: 174:affine space 122: 53: 47: 5417:singularity 5263:Polar curve 4423:indexed as 3384:BC, CA, AB, 3086:BC, CA, CB, 2793:Lucas cubic 2024:BC, CA, AB, 1757:orthocenter 1742:BC, CA, AB, 1662:of a point 718:barycentric 123:applied to 50:mathematics 18:Cubic curve 5258:Dual curve 4886:Topics in 4510:References 3953:for which 2400:such that 2091:AD, BE, CF 2087:BC, CA, AB 2003:such that 1666:such that 1330:BC, CA, AB 469:, over an 467:inflection 5371:Morphisms 5119:Bitangent 4794:123411561 4766:: 135–146 4752:: 161–171 4706:: 107–114 4677:126542269 4648:119886462 4619:122633134 4590:120174967 4561:116778499 4224:− 4186:− 4161:∑ 3894:− 3852:− 3820:∑ 3778:− 3746:− 3721:∑ 3562:− 3540:∑ 3466:− 3438:∑ 3257:− 3235:∑ 3151:− 3123:∑ 3006:− 2974:− 2939:∑ 2887:− 2849:⁡ 2837:∑ 2692:− 2640:− 2573:∑ 2531:− 2506:− 2497:⁡ 2485:∑ 2353:− 2308:− 2285:− 2215:∑ 2173:− 2146:⁡ 2135:⁡ 2129:− 2121:⁡ 2106:∑ 1956:− 1921:∑ 1879:− 1848:∑ 1658:) is the 1607:− 1562:− 1539:− 1472:∑ 1430:− 1403:⁡ 1392:⁡ 1383:− 1375:⁡ 1360:∑ 1225:∗ 1045:∑ 848:→ 832:→ 816:→ 775:→ 756:→ 737:→ 714:trilinear 554:, or one 189:monomials 5489:Category 4476:See also 4455:(1931), 4451:(1453), 3961:, where 2767:A, B, C, 2743:, where 2441:A, B, C, 2408:, where 2020:A, B, C, 2011:, where 1749:incenter 1718:, where 1674:, where 168:for the 5442:Tacnode 5427:Crunode 4848:YouTube 4734:: 1–295 4692:: 51–58 4447:(672), 4443:(365), 4439:(292), 4435:(238), 4431:(105), 3976:in the 2758:in the 2445:A, B, C 2412:is the 2079:D, E, F 1769:A, B, C 1763:, both 1759:, both 1685:in the 560:tacnode 547:field. 543:is the 356:⁠ 195:⁠ 166:⁠ 128:⁠ 118:⁠ 71:⁠ 5422:Acnode 5335:Moduli 4792:  4720:: 1–27 4675:  4646:  4617:  4588:  4559:  4528:  4427:(31), 4165:cyclic 3824:cyclic 3725:cyclic 3544:cyclic 3442:cyclic 3363:, let 3356:A'B'C' 3239:cyclic 3127:cyclic 3092:A'B'C' 3088:where 2943:cyclic 2841:cyclic 2577:cyclic 2489:cyclic 2219:cyclic 2110:cyclic 1925:cyclic 1852:cyclic 1830:(2) – 1476:cyclic 1364:cyclic 1049:cyclic 398:pencil 4790:S2CID 4673:S2CID 4644:S2CID 4615:S2CID 4586:S2CID 4557:S2CID 1660:locus 1212:then 443:– 1)) 435:– 1, 367:field 56:is a 5432:Cusp 4526:ISBN 4465:K155 4350:and 3989:K021 3974:(99) 3670:K018 3659:and 3414:K017 3352:Let 3106:and 3057:K007 2782:K005 2461:K004 2047:K002 1791:K001 1683:(30) 1650:The 1342:, CX 1338:, BX 1160:and 716:and 556:cusp 424:+ 1) 52:, a 4782:doi 4732:129 4665:doi 4636:doi 4607:doi 4578:doi 4549:doi 4467:at 3991:at 3980:). 3959:S*X 3693:ABC 3672:at 3653:XX* 3416:at 3400:, X 3396:, X 3373:, X 3369:, X 3099:ABC 3059:at 2846:cos 2805:ABC 2784:at 2773:ABC 2762:). 2756:(5) 2494:cos 2463:at 2143:cos 2132:cos 2118:cos 2070:ABC 2049:at 2030:ABC 1782:ABC 1775:ABC 1715:ABC 1400:cos 1389:cos 1372:cos 1319:, X 1315:, X 1302:ABC 1131:ABC 709:ABC 578:ABC 439:â‹… ( 431:↦ ( 420:â‹… ( 181:= 1 48:In 5491:: 4846:. 4788:, 4778:55 4776:, 4762:, 4748:, 4744:, 4730:, 4716:, 4702:, 4688:, 4671:, 4661:68 4659:, 4642:, 4632:66 4630:, 4613:, 4603:53 4601:, 4584:, 4574:66 4572:, 4555:, 4545:63 4543:, 4472:. 4416:. 3996:. 3970:= 3955:X* 3947:X* 3706:X* 3677:. 3661:X* 3421:. 3108:Ω′ 3064:. 2822:X' 2818:X' 2789:. 2776:. 2752:= 2741:NX 2737:X* 2468:. 2406:LX 2402:X* 2054:. 2009:GX 2005:X* 1823:′) 1798:. 1785:. 1755:, 1751:, 1672:EX 1668:X* 1334:AX 1169:X* 1147:XA 1136:X* 1121:X* 1018:0. 720:. 416:= 404:. 5414:k 5412:A 4879:e 4872:t 4865:v 4809:. 4797:. 4784:: 4768:. 4764:2 4754:. 4750:1 4722:. 4718:3 4708:. 4704:1 4694:. 4690:1 4680:. 4667:: 4651:. 4638:: 4622:. 4609:: 4593:. 4580:: 4564:. 4551:: 4535:. 4457:X 4453:X 4449:X 4445:X 4441:X 4437:X 4433:X 4429:X 4425:X 4413:Z 4411:X 4406:Y 4404:X 4400:X 4386:. 4383:y 4380:: 4377:x 4374:: 4371:z 4368:= 4363:Z 4359:X 4338:x 4335:: 4332:z 4329:: 4326:y 4323:= 4318:Y 4314:X 4293:z 4290:: 4287:y 4284:: 4281:x 4278:= 4275:X 4253:0 4250:= 4247:) 4242:2 4238:z 4232:3 4228:b 4219:2 4215:y 4209:3 4205:c 4201:( 4198:x 4195:) 4192:c 4189:b 4181:2 4177:a 4173:( 4170:a 4138:) 4135:x 4132:b 4129:+ 4126:z 4123:a 4120:( 4117:) 4114:z 4111:a 4108:+ 4105:y 4102:c 4099:( 4096:) 4093:y 4090:c 4087:+ 4084:x 4081:b 4078:( 4075:= 4072:) 4069:z 4066:b 4063:+ 4060:y 4057:a 4054:( 4051:) 4048:y 4045:a 4042:+ 4039:x 4036:c 4033:( 4030:) 4027:x 4024:c 4021:+ 4018:z 4015:b 4012:( 3972:X 3968:S 3963:S 3951:X 3943:X 3939:X 3923:0 3920:= 3917:) 3912:2 3908:z 3902:2 3898:b 3889:2 3885:y 3879:2 3875:c 3871:( 3868:x 3865:) 3860:2 3856:c 3847:2 3843:b 3839:( 3834:2 3830:a 3797:0 3794:= 3791:) 3786:2 3782:z 3773:2 3769:y 3765:( 3762:x 3759:) 3754:2 3750:c 3741:2 3737:b 3733:( 3730:a 3708:. 3702:X 3698:X 3691:â–ł 3657:X 3649:X 3633:0 3630:= 3627:) 3622:2 3618:z 3612:2 3608:b 3604:+ 3599:2 3595:y 3589:2 3585:c 3581:( 3578:x 3575:) 3570:2 3566:c 3557:2 3553:b 3549:( 3517:0 3514:= 3511:) 3506:2 3502:z 3498:+ 3493:2 3489:y 3485:( 3482:x 3479:) 3474:2 3470:c 3461:2 3457:b 3453:( 3450:c 3447:b 3402:C 3398:B 3394:A 3392:X 3388:X 3375:C 3371:B 3367:A 3365:X 3361:X 3354:â–ł 3338:0 3335:= 3332:) 3327:2 3323:z 3317:2 3313:b 3309:+ 3304:2 3300:y 3294:2 3290:c 3286:( 3283:x 3280:) 3275:2 3271:c 3265:2 3261:b 3252:4 3248:a 3244:( 3212:0 3209:= 3206:) 3201:2 3197:z 3193:+ 3188:2 3184:y 3180:( 3177:x 3174:) 3169:2 3165:c 3159:2 3155:b 3146:4 3142:a 3138:( 3135:c 3132:b 3104:Ω 3097:â–ł 3090:â–ł 3078:X 3045:X 3041:X 3025:0 3022:= 3019:) 3014:2 3010:z 3001:2 2997:y 2993:( 2990:x 2987:) 2982:2 2978:a 2969:2 2965:c 2961:+ 2956:2 2952:b 2948:( 2916:0 2913:= 2910:) 2905:2 2901:z 2895:2 2891:c 2882:2 2878:y 2872:2 2868:b 2864:( 2861:x 2858:) 2855:A 2852:( 2814:X 2810:X 2803:â–ł 2771:â–ł 2754:X 2750:N 2745:N 2721:0 2718:= 2715:) 2710:2 2706:z 2700:2 2696:b 2687:2 2683:y 2677:2 2673:c 2669:( 2666:x 2663:) 2658:2 2654:) 2648:2 2644:c 2635:2 2631:b 2627:( 2624:+ 2621:) 2616:2 2612:c 2608:+ 2603:2 2599:b 2595:( 2590:2 2586:a 2582:( 2550:0 2547:= 2544:) 2539:2 2535:z 2526:2 2522:y 2518:( 2515:x 2512:) 2509:C 2503:B 2500:( 2453:P 2449:P 2434:X 2430:X 2426:X 2422:X 2418:X 2410:L 2398:X 2382:0 2379:= 2376:) 2371:2 2367:z 2361:2 2357:b 2348:2 2344:y 2338:2 2334:c 2330:( 2327:x 2324:) 2319:4 2315:a 2311:3 2303:2 2299:) 2293:2 2289:c 2280:2 2276:b 2272:( 2269:+ 2266:) 2261:2 2257:c 2253:+ 2248:2 2244:b 2240:( 2235:2 2231:a 2227:2 2224:( 2192:0 2189:= 2186:) 2181:2 2177:z 2168:2 2164:y 2160:( 2157:x 2154:) 2150:C 2139:B 2125:A 2115:( 2083:X 2075:X 2068:â–ł 2039:P 2035:P 2028:â–ł 2013:G 2001:X 1985:0 1982:= 1979:) 1974:2 1970:z 1964:2 1960:b 1951:2 1947:y 1941:2 1937:c 1933:( 1930:x 1898:0 1895:= 1892:) 1887:2 1883:z 1874:2 1870:y 1866:( 1863:x 1860:c 1857:b 1835:. 1832:X 1828:X 1821:X 1819:( 1817:X 1812:X 1780:â–ł 1773:â–ł 1738:X 1732:C 1730:X 1728:B 1726:X 1724:A 1722:X 1720:â–ł 1713:â–ł 1707:C 1705:X 1703:B 1701:X 1699:A 1697:X 1695:â–ł 1691:X 1681:X 1676:E 1664:X 1636:0 1633:= 1630:) 1625:2 1621:z 1615:2 1611:b 1602:2 1598:y 1592:2 1588:c 1584:( 1581:x 1578:) 1573:4 1569:a 1565:2 1557:2 1553:) 1547:2 1543:c 1534:2 1530:b 1526:( 1523:+ 1520:) 1515:2 1511:c 1507:+ 1502:2 1498:b 1494:( 1489:2 1485:a 1481:( 1449:0 1446:= 1443:) 1438:2 1434:z 1425:2 1421:y 1417:( 1414:x 1411:) 1407:C 1396:B 1386:2 1379:A 1369:( 1344:C 1340:B 1336:A 1326:X 1321:C 1317:B 1313:A 1311:X 1307:X 1300:â–ł 1275:. 1269:z 1266:1 1260:: 1254:y 1251:1 1245:: 1239:x 1236:1 1230:= 1221:X 1200:, 1197:z 1194:: 1191:y 1188:: 1185:x 1182:= 1179:X 1164:C 1162:L 1157:B 1155:L 1151:A 1142:A 1140:L 1129:â–ł 1125:X 1111:. 1099:0 1096:= 1093:) 1090:c 1087:, 1084:b 1081:, 1078:a 1075:, 1072:z 1069:, 1066:y 1063:, 1060:x 1057:( 1054:f 1015:= 1012:) 1009:y 1006:, 1003:x 1000:, 997:z 994:, 991:b 988:, 985:a 982:, 979:c 976:( 973:f 970:+ 967:) 964:x 961:, 958:z 955:, 952:y 949:, 946:a 943:, 940:c 937:, 934:b 931:( 928:f 925:+ 922:) 919:z 916:, 913:y 910:, 907:x 904:, 901:c 898:, 895:b 892:, 889:a 886:( 883:f 857:. 854:z 851:c 845:z 841:, 838:y 835:b 829:y 825:, 822:x 819:a 813:x 787:; 784:z 781:b 778:a 772:z 768:, 765:y 762:a 759:c 753:y 749:, 746:x 743:c 740:b 734:x 707:â–ł 693:. 689:| 685:B 682:A 678:| 674:= 671:c 652:, 648:| 644:A 641:C 637:| 633:= 630:b 611:, 607:| 603:C 600:B 596:| 592:= 589:a 576:â–ł 541:K 531:- 529:K 513:K 483:C 445:. 441:t 437:t 433:t 429:t 422:x 418:x 414:y 386:P 382:C 378:F 374:P 370:K 344:z 341:y 338:x 335:, 332:y 327:2 323:z 319:, 316:x 311:2 307:z 303:, 300:z 295:2 291:y 287:, 284:x 279:2 275:y 271:, 268:z 263:2 259:x 255:, 252:y 247:2 243:x 239:, 234:3 230:z 226:, 221:3 217:y 213:, 208:3 204:x 185:F 179:z 154:) 151:z 148:: 145:y 142:: 139:x 136:( 106:0 103:= 100:) 97:z 94:, 91:y 88:, 85:x 82:( 79:F 61:C 34:. 20:)

Index

Cubic curve
Cubic function

mathematics
plane algebraic curve
cubic equation
homogeneous coordinates
projective plane
affine space
monomials
projective space
field
general position
five points determine a conic
pencil
Cayley–Bacharach theorem

singular point
parametrization
projective line
inflection
algebraically closed
complex numbers
Hessian matrix
BĂ©zout's theorem
Isaac Newton
Euclidean plane
conic sections
elliptic curve
Weierstrass's elliptic functions

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