Carlyle circle

English dictionary entry

Meanings

noun
  1. A certain circle in a coordinate plane associated with a quadratic equation, having the property that the solutions of the equation are the horizontal coordinates of the intersections of the circle with the horizontal axis.

Word forms

Carlyle circle Carlyle circles

Etymology

The idea of using such a circle to solve a quadratic equation is attributed to Thomas Carlyle (1795–1881).

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