| 单词 | three-pointic |
| 释义 | > as lemmasthree-pointic Prefixed by an integer n to form adjectives with the sense ‘having, relating to, or passing through n points’, as two-pointic, three-pointic, etc. ΚΠ 1859 Proc. Royal Soc. 1857–9 9 703 The theory of the conic of five-pointic contact has recently been established by Mr. Salmon. 1873 G. Salmon Treat. Higher Plane Curves (ed. 2) vi. 207 Three nodes may coincide as consecutive points of a curve of finite curvature, giving rise, not to a triple point, but to the singularity called an oscnode; this is, in fact, an osculation or three-pointic contact of two branches of the curve. 1898 Amer. Math. Monthly 5 119 At each point of a parabola is described the rectangular hyperbola of four-pointic contact. 1909 Trans. Amer. Math. Soc. 10 292 In this special case twenty-seven seven-pointic conics actually exist. 1959 Amer. Math. Monthly 66 637 A member..of the 6-parameter family G8 of 8-pointic quartics. < as lemmas |
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