Tschirnhausen cubic

English

Alternative forms

Tschirnhaus' cubic

Etymology

Named after Ehrenfried Walther von Tschirnhaus (1651–1708), German mathematician, physicist, physician, and philosopher. The name was first used in a 1900 paper by R. C. Archibald.

Noun

Tschirnhausen cubic (plural Tschirnhausen cubics)

(geometry) A plane curve defined, in its left-opening form, by the polar equation $r=a\sec ^{3}(\theta /3)$ where sec is the secant function.

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