Schur function expansion for normal matrix model and associated discrete matrix models

Details Schur function expansion for normal matrix model and associated discrete matrix models Schur function expansion for normal matrix model and associated discrete matrix models

2005-01-09

arxiv.org/abs/math-ph/0501017v1

Physics

Mathematical Physics

21 pages, no figures. Some parts of this paper were presented on ISLAND II conference, Arran 2003

Scientific paper

10.1016/j.physleta.2005.05.096

We consider Schur function expansion for the partition function of the model of normal matrices. We show that this expansion coincides with Takasaki expansion \cite{Tinit} for tau functions of Toda lattice hierarchy. We show that the partition function of the model of normal matrices is, at the same time, a partition function of certain discrete models, which can be solved by the method of orthogonal polynomials. We obtain discrete versions of various known matrix models: models of non-negative matrices, unitary matrices, normal matrices.

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