Dual Curve - Polar Reciprocal

The dual can be visualized as a locus in the plane in the form of the polar reciprocal. This is defined with reference to a fixed conic Q as the locus of the poles of the tangent lines of the curve C. The conic Q is nearly always taken to be a circle and this case the polar reciprocal is the inverse of the pedal of C.

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Famous quotes containing the words polar and/or reciprocal:

    “Professor Fate: My apologies. There’s a polar bear in our car.”
    —Arthur Ross. Professor Fate (Jack Lemmon)

    “I had no place in any coterie, or in any reciprocal self-advertising. I stood alone. I stood outside. I wanted only to learn. I wanted only to write better.”
    —Ellen Glasgow (1873–1945)