单词 | multiple tangent |
释义 | > as lemmasmultiple tangent multiple tangent n. Mathematics a line or plane that touches a curve or surface tangentially at two or more points. ΚΠ 1852 G. Salmon Treat. Higher Plane Curves ii. 34 It will be more simple to commence our discussion of multiple tangents by examining the condition that the axis (y = 0) should be a multiple tangent. 1878 Philos. Trans. 1877 (Royal Soc.) 167 373 The envelope of OO′ will be a curve of the nth class, to which the line CL will be a multiple tangent of the order (n − 1). 1930 Amer. Jrnl. Math. 52 155 Each of the ω tangents through A to a generic curve C of K is, in general, a multiple tangent, having with C one or more contacts of order ≧ 1. 1991 Amer. Math. Monthly 98 159 The x-axis is a multiple tangent of x4 − 2x2 + 1. < as lemmas |
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