bn:00166596n
Noun Concept
JA
チルンハウスの三次曲線
EN
In algebraic geometry, the Tschirnhausen cubic, or Tschirnhaus' cubic is a plane curve defined, in its left-opening form, by the polar equation r = a sec 3 ⁡ {\displaystyle r=a\sec ^{3}\left} where sec is the secant function. Wikipedia
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