英语词汇“pinch plane”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

> as lemmas

pinch plane

pinch plane n.

Brit.

/ˈpɪn(t)ʃ pleɪn/

U.S.

/ˈpɪn(t)ʃ ˌpleɪn/

Mathematics rare a plane which is a tangent to a curved surface at every point of a line or curve lying in the surface.

ΚΠ

1869 A. Cayley in Philos. Trans. (Royal Soc.) 159 207 The pinch-plane, or reciprocal singularity j′ = l, is in fact a torsal plane touching the surface along a line, or meeting it in the line twice and in a residual curve... Considering..the reciprocal figure, the reciprocal of the pinch-plane is thus a point of the nodal curve, and is a pinch-point.

1929 Amer. Math. Monthly 36 515 If we reciprocate the above configuration we get another rational surface having a pinch plane.

extracted from pinch-comb. form

as lemmas

单词	pinch plane
释义	> as lemmas pinch plane pinch plane n. Brit. /ˈpɪn(t)ʃ pleɪn/ , U.S. /ˈpɪn(t)ʃ ˌpleɪn/ Mathematics rare a plane which is a tangent to a curved surface at every point of a line or curve lying in the surface. ΚΠ 1869 A. Cayley in Philos. Trans. (Royal Soc.) 159 207 The pinch-plane, or reciprocal singularity j′ = l, is in fact a torsal plane touching the surface along a line, or meeting it in the line twice and in a residual curve... Considering..the reciprocal figure, the reciprocal of the pinch-plane is thus a point of the nodal curve, and is a pinch-point. 1929 Amer. Math. Monthly 36 515 If we reciprocate the above configuration we get another rational surface having a pinch plane. extracted from pinch-comb. form < as lemmas
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