Fredholm Determinants, Differential Equations and Matrix Models

Details Fredholm Determinants, Differential Equations and Matrix Models Fredholm Determinants, Differential Equations and Matrix Models

1993-06-07

arxiv.org/abs/hep-th/9306042v3

Commun.Math.Phys. 163 (1994) 33-72

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, LaTeX using RevTeX 3.0 macros; last version changes only the abstract and decreases length of typeset version

Scientific paper

10.1007/BF02101734

Orthogonal polynomial random matrix models of NxN hermitian matrices lead to Fredholm determinants of integral operators with kernel of the form (phi(x) psi(y) - psi(x) phi(y))/x-y. This paper is concerned with the Fredholm determinants of integral operators having kernel of this form and where the underlying set is a union of open intervals. The emphasis is on the determinants thought of as functions of the end-points of these intervals. We show that these Fredholm determinants with kernels of the general form described above are expressible in terms of solutions of systems of PDE's as long as phi and psi satisfy a certain type of differentiation formula. There is also an exponential variant of this analysis which includes the circular ensembles of NxN unitary matrices.

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