| 单词 | point-sphere |
| 释义 | > as lemmaspoint-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. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。