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Quadruple Point

\begin{figure}\begin{center}\BoxedEPSF{TriplePoint.epsf scaled 800}\end{center}\end{figure}

A point where a curve intersects itself along four arcs. The above plot shows the quadruple point at the Origin of the Quadrifolium $(x^2+y^2)^3-4x^2y^2=0$.

See also Double Point, Triple Point


Walker, R. J. Algebraic Curves. New York: Springer-Verlag, pp. 57-58, 1978.

© 1996-9 Eric W. Weisstein