Adjoint Curve

A curve which has at least multiplicity r_i-1 at each point where a given curve (having only ordinary singular points and cusps) has a multiplicity r_i is called the adjoint to the given curve. When the adjoint curve is of order n-3, it is called a special adjoint curve.

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Coolidge, J. L. A Treatise on Algebraic Plane Curves. New York: Dover, p. 30, 1959.

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Adjoint Curve

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Weisstein, Eric W. "Adjoint Curve." From MathWorld--A Wolfram Web Resource.

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