Cassini oval

短语

词形变化

Cassini ovals 复数 Cassini ovals

别名

Cassinian oval

释义与例句

n.
  1. 1.

    A plane curve defined as the set (or locus) of points in the plane such that the product of the distances to two fixed points is constant (related to an ellipse, for which the sum of the distances is constant).

    数学

词源

Named after the astronomer Giovanni Domenico Cassini, who studied them in 1680.

来源：wiktionary