Quadratic sheaves and self-linkage

Details Quadratic sheaves and self-linkage Quadratic sheaves and self-linkage

2001-06-13

arxiv.org/abs/math/0106104v1

Mathematics

Algebraic Geometry

AmS-ppt, 12 pages, no figures

Scientific paper

Generalizing an old result proved by P. Rao [see MR 83i:14025] for arithmetically Cohen-Macaulay, self-linked subschemes of codimension 2 in the projective n-space P, we give a characterization of self-linked pure subschemes of codimension 2 in P satisfying a necessary parity condition, in characteristic different from 2. We make use of the theory of quadratic sheaves described in a previous paper of the authors [see MR 99h:14044].

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