Plane and solid analytic geometry; an elementary textbook (1904)
Ashton, Charles Hamilton, 1866-1936 · New York, C. Scribner's Sons · leaf 213
ar to Fig. 97 ;while, if n is a fraction with anodd numerator and an even de-nominator, the curve is similarto Fig. 98. 102. The Cassinian oval.—Thelocus of a point, the product ofwhose distances from two fixed points is constant, iscalled a Cassinian oval. The two fixed points are calledthe foci… … Fig. 98.
Geometry, Analytic
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