| 释义 |
ovals of cas·si·ni
\-kəˈsēnē, -ka-, -kȧ-\
Usage: usually capitalized C
Etymology: after G.D. Cassini died 1712 French astronomer
: a curve that is the locus of points of the vertex of a triangle whose opposite side is fixed and the product of whose adjacent sides is a constant and that has the equation [(x + a)2 + y2] [(x - a)2 + y2] - k4 = 0 where k is the constant and a is one half the length of the fixed side |