Determinant of complexes and higher Hessians

Details Determinant of complexes and higher Hessians Determinant of complexes and higher Hessians

1996-01-02

arxiv.org/abs/alg-geom/9601001v1

Mathematics

Algebraic Geometry

AMSTeX preprint style

Scientific paper

Let $X \subset \Bbb P^r$ be a smooth algebraic curve in projective space, over an algebraically closed field of characteristic zero. For each $m \in \Bbb N$, the $m$-flexes of $X$ are defined as the points where the osculating hypersurface of degree $m$ has higher contact than expected, and a hypersurface $H \subset \Bbb P^r$ is called a $m$-Hessian if it cuts $X$ along its $m$-flexes. When $X$ is a complete intersection, we give an expression for a (rational) $m$-Hessian as the Div (in the sense of Grothendieck-Knudsen-Mumford) of a complex of graded free modules naturally associated to $X$. The construction of this complex involves relating sheaves of differential operators on a scheme and a subscheme, and higher Euler sequences on projective space.

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