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

† quadricone n. Geometry Obsolete a quadric surface swept out by a straight line passing through a fixed point such that no straight line can intersect it at more than two points.

ΚΠ

1867 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art III. 158/1 Quadric cone, a cone of the second order.]

1869 A. Cayley in Philos. Trans. (Royal Soc.) 159 206 The binode..is a biplanar node, where instead of the proper quadricone we have two planes; these may be called the biplanes, and their line of intersection, the edge of the binode.

1892 Amer. Jrnl. Math. 14 173 A quadratic surface can contain more than one self-reciprocal twisted cubic only when it degenerates into a quadricone.

单词	quadricone
释义	> as lemmas quadricone † quadricone n. Geometry Obsolete a quadric surface swept out by a straight line passing through a fixed point such that no straight line can intersect it at more than two points. ΚΠ 1867 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art III. 158/1 Quadric cone, a cone of the second order.] 1869 A. Cayley in Philos. Trans. (Royal Soc.) 159 206 The binode..is a biplanar node, where instead of the proper quadricone we have two planes; these may be called the biplanes, and their line of intersection, the edge of the binode. 1892 Amer. Jrnl. Math. 14 173 A quadratic surface can contain more than one self-reciprocal twisted cubic only when it degenerates into a quadricone. extracted from quadri-comb. form < as lemmas
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