Symmetry algebras of normal \mathcal{A}-hypergeometric systems
Mutsumi Saito · Hokkaido Mathematical Journal · 1996
The structure of the symmetry algebras of normal A-hypergeometric systems is studied and determined in terms of generators and relations.An irreducible component of the semisimple part of their symmetry Lie algebras is proved to be either of A-type or of C-type.This result generalizes Hrabowski's theorem [Hr].