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math.AG2000
Logarithm-free A-hypergeometric series
Mutsumi Saito
We give a dimension formula for the space of logarithm-free series solutions to an A-hypergeometric (or a GKZ hypergeometric) system. In the case where the convex hull spanned by A…
math.AG1999
Isomorphism classes of A-hypergeometric systems
Mutsumi Saito
For a finite set A of integral vectors, Gel'fand, Kapranov and Zelevinskii defined a system of differential equations with a parameter vector as a D-module, which system is called…