Differential Equations Compatible with KZ Equations

Details Differential Equations Compatible with KZ Equations Differential Equations Compatible with KZ Equations

2000-01-31

arxiv.org/abs/math/0001184v1

Mathematics

Quantum Algebra

34 pages, LaTeX

Scientific paper

We define a system of "dynamical" differential equations compatible with the KZ differential equations. The KZ differential equations are associated to a complex simple Lie algebra $\mathbf{g}$. These are equations on a function of $n$ complex variables $z_i$ taking values in the tensor product of $n$ finite dimensional $\mathbf{g}$-modules. The KZ equations depend on the "dual" variable in the Cartan subalgebra of $\mathbf{g}$. The dynamical differential equations are differential equations with respect to the dual variable. We prove that the standard hypergeometric solutions of the KZ equations also satisfy the dynamical equations. As an application we give a new determinant formula for the coordinates of a basis of hypergeometric solutions.

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