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Higher Lame Equations and Critical Points of Master Functions

E. Mukhin, V. Tarasov, A. Varchenko

math.CAarXiv:math/0601703

Abstract

Under certain conditions, we give an estimate from above on the number of differential equations of order r+1 with prescribed regular singular points, prescribed exponents at singular points, and having a quasi-polynomial flag of solutions. The estimate is given in terms of a suitable weight subspace of the tensor power U(-) (n-1), where n is the number of singular points in and U(-) is the enveloping algebra of the nilpotent subalgebra of r+1.

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