%0 Journal Article
%T Degeneracy Schemes and Schubert Varieties
%A V. Lakshmibai
%A Peter Magyar
%J Mathematics
%D 1997
%I arXiv
%X A result of Zelevinsky states that an orbit closure in the space of representations of the equioriented quiver of type $A_h$ is in bijection with the opposite cell in a Schubert variety of a partial flag variety $SL(n)/Q$. We prove that Zelevinsky's bijection is a scheme-theoretic isomorphism, which shows that the universal degeneracy schemes of Fulton are reduced and Cohen-Macaulay in arbitrary characteristic.
%U http://arxiv.org/abs/alg-geom/9709018v1