On matrices in prescribed conjugacy classes with no common invariant subspace and sum zero
Rings and Algebras
2007-05-23 v5 Algebraic Geometry
Abstract
We determine those k-tuples of conjugacy classes of matrices, from which it is possible to choose matrices which have no common invariant subspace and have sum zero. This is an additive version of the Deligne-Simpson problem. We deduce the result from earlier work of ours on preprojective algebras and the moment map for representations of quivers. Our answer depends on the root system for a Kac-Moody Lie algebra.
Cite
@article{arxiv.math/0103101,
title = {On matrices in prescribed conjugacy classes with no common invariant subspace and sum zero},
author = {William Crawley-Boevey},
journal= {arXiv preprint arXiv:math/0103101},
year = {2007}
}
Comments
11 pages. Only trivial changes since the last version