英语词汇“point-sphere”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

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单词	point-sphere
释义	> as lemmas point-sphere point-sphere n. Mathematics a mathematical point regarded as an infinitesimally small sphere or a degenerate form of a sphere. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > sphericity or globularity > sphere > point regarded as point-sphere1866 1866 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art (new ed.) II. 946/1 A point-circle has thus the equation x² + y² = 0, and a point-sphere the equation x² + y² + z² = 0. 1989 Trans. Amer. Math. Soc. 311 118 Those Lie sphere transformations which preserve that part of the Lie quadric corresponding to point-spheres. extracted from pointn.¹ < as lemmas
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> as lemmas