On duals of smooth plane curves

Homma, Masaaki

doi:10.1090/S0002-9939-1993-1143223-5

On duals of smooth plane curves
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Proc. Amer. Math. Soc. 118 (1993), 785-790 Request permission

Abstract:

We prove that for given two distinct smooth curves in the projective plane over an algebraically closed field, their duals in the dual plane coincide if and only if they are conics in characteristic two with the same center.

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