A cohomology free description of eigencones in type A, B and C

Details A cohomology free description of eigencones in type A, B and C A cohomology free description of eigencones in type A, B and C

2009-08-31

arxiv.org/abs/0908.4557v2

Mathematics

Algebraic Geometry

Scientific paper

Let $K$ be a connected compact Lie group. The triples $(O_1,\,O_2,\,O_3)$ of
adjoint $K$-orbits such that $O_1+O_2+O_3$ contains $0$ are parametrized by a
closed convex polyhedral cone called the eigencone of $K$. For $K$ simple of
type $A$, $B$ or $C$ we give an inductive cohomology free description of the
minimal set of linear inequalities which characterizes the eigencone of $K$.

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