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单词 bicircular
释义 biˈcircular, a. Math.
[bi-2 1 and 2.]
Applied to a class of quartic curves each of which passes twice through each of the circular points at infinity, and thus resembles (analytically, and sometimes in form) a pair of circles.
1867J. Casey Bicircular Quartics in Trans. R. Ir. Acad. XXIV. i. 458 A bicircular quartic; that is,..a quartic having the two circular points at infinity as double points.1872B. Williamson Diff. Calc. xi. 195 A curve of the fourth degree of the class called ‘bicircular quartics’.1879G. Salmon Higher Plane Curves (ed. 3) 241 Quartics with two nodes, in the case where these are the circular points at infinity, have been extensively studied under the name of bicircular quartics.1880Athenæum 20 Nov. 678/3 Bicircular Quartics.
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