Vector spaces of skew-symmetric matrices of constant rank

Details Vector spaces of skew-symmetric matrices of constant rank Vector spaces of skew-symmetric matrices of constant rank

2010-11-16

arxiv.org/abs/1011.3779v1

Mathematics

Algebraic Geometry

20 pages

Scientific paper

We study the orbits of vector spaces of skew-symmetric matrices of constant rank 2r and type (N+1)x(N+1) under the natural action of SL(N+1), over an algebraically closed field of characteristic zero. We give a complete description of the orbits for vector spaces of dimension 2, relating them to some 1-generic matrices of linear forms. We also show that, for each rank two vector bundle on P^2 defining a triple Veronese embedding of P^2 in G(1,7), there exists a vector space of 8 x 8 skew-symmetric matrices of constant rank 6 whose kernel bundle is the dual of the given rank two vector bundle.

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