Cuspidal Projections of Space Curves.
Courbes sur un trait et morphismes de contraction.
A proof of Noether's formula for the arithmetic genus of an algebraic surface
Polar classes of singular varieties
Arithmetically Cohen-Macaulay curves in P4 of degree 4 and genus 0.
Higher order duality and toric embeddings
The notion of higher order dual varieties of a projective variety, introduced by Piene in 1983, is a natural generalization of the classical notion of projective duality. In this paper we study higher order dual varieties of projective toric embeddings. We express the degree of the second dual variety of a 2-jet spanned embedding of a smooth toric threefold in geometric and combinatorial terms, and we classify those whose second dual variety has dimension less than expected. We also describe the...
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