| 单词 | point pair |
| 释义 | > as lemmaspoint pair point pair n. Mathematics two points considered together or forming a pair. ΚΠ 1860 A. Cayley in Philos. Trans. (Royal Soc.) 149 63 [The] equation..represents..a system of m points, or point-system of the order m... When m = 1 we have of course a single point, when m = 2 we have a quadric or point-pair, when m = 3 a cubic or point-triplet, and so on. 1934 Amer. Jrnl. Math. 56 375 A plane of the first species corresponds in π to a linear system of hyperplane hyperquadrics consisting of every point pair on a line. 1995 Operations Res. 43 689/2 Off-diagonal entries reflect covariances that decrease with the distance between the point pairs. < as lemmas |
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