| 单词 | polar surface |
| 释义 | > as lemmaspolar surface polar surface n. Geometry a surface related to a given surface and a given point in a way analogous to the way a polar ( A. 2a) is related to a curve. ΚΠ 1865 Philos. Trans. (Royal Soc.) 155 761 With regard to this ellipsoid the wave-surface is its own polar surface, i.e. the polar plane of any point of the surface touches it in another point. 1950 Proc. Amer. Math. Soc. 1 328 In the elliptic case it is interesting to consider the polar surface Sn−1(π/2) to the given Sn−1. 1970 Ann. Math. 92 371 The distance on S3 from η(a, 0) to η(b, 0), i.e., the distance between the corresponding points on the polar surface. < as lemmas |
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