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Wallis’s conical edge : ウィキペディア英語版 | Wallis's conical edge
Wallis's conical edge is a ruled surface given by the parametric equations: : where ''a'', ''b'' and ''c'' are constants. Wallis's conical edge is also a kind of right conoid. Figure 2 shows that the Wallis's conical edge is generated by a moving line. Wallis's conical edge is named after the English mathematician John Wallis, who was one of the first to use Cartesian methods to study conic sections.() == See also ==
* Ruled surface * Right conoid
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