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Semi-cubic parabola

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A third-order algebraic curve in the plane whose equation in Cartesian coordinates is

The origin is a cusp (see Fig.). The length of the arc from the origin equals

and the curvature equals

A semi-cubic parabola is sometimes called a Neil parabola.

Figure: s084040a

References

[1] A.A. Savelov, "Planar curves" , Moscow (1960) (In Russian)
[2] A.S. Smogorzhevskii, E.S. Stolova, "Handbook of the theory of planar curves of the third order" , Moscow (1961) (In Russian)


Comments

References

[a1] J.D. Lawrence, "A catalog of special plane curves" , Dover, reprint (1972)
[a2] F. Gomes Teixeira, "Traité des courbes" , 1–3 , Chelsea, reprint (1971)
How to Cite This Entry:
Semi-cubic parabola. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Semi-cubic_parabola&oldid=13302
This article was adapted from an original article by D.D. Sokolov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article