Wallis's conical edge
In geometry, Wallis's conical edge is a ruled surface given by the parametric equations

Figure 1. Wallis's Conical Edge with a = b = c = 1

Figure 2. Wallis's Conical Edge with a = 1.01, b = c = 1
where a, b and c are constants.
Wallis's conical edge is also a kind of right conoid. It is named after the English mathematician John Wallis, who was one of the first to use Cartesian methods to study conic sections.[1]
See also
References
- Abbena, Elsa; Salamon, Simon; Gray, Alfred (21 June 2006). Modern Differential Geometry of Curves and Surfaces with Mathematica, Third Edition. ISBN 9781584884484.
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