Kappa
From Encyclopedia of Mathematics
A plane algebraic curve of order four whose equation in Cartesian rectangular coordinates has the form
 |
and in polar coordinates:
 |
Figure: k055110a
The origin is a nodal point with coincident tangents 
(see Fig.). The asymptotes are the lines 
. It is related to the so-called nodes (cf. Node in geometry).
References
| [1] | A.A. Savelov, "Planar curves" , Moscow (1960) (In Russian) |
Comments
References
| [a1] | J.D. Lawrence, "A catalog of special plane curves" , Dover, reprint (1972) |
How to Cite This Entry:
Kappa. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Kappa&oldid=12175
Kappa. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Kappa&oldid=12175
This article was adapted from an original article by D.D. Sokolov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article