Rational solutions to the Pfaff lattice and Jack polynomials
Abstract
The finite Pfaff lattice is given by commuting Lax pairs involving a finite matrix L (zero above the first subdiagonal) and a projection onto Sp(N). The lattice admits solutions such that the entries of the matrix L are rational in the time parameters t_1,t_2,..., after conjugation by a diagonal matrix. The sequence of polynomial tau-functions, solving the problem, belongs to an intriguing chain of subspaces of Schur polynomials, associated to Young diagrams, dual with respect to a finite chain of rectangles. Also, this sequence of tau-functions is given inductively by the action of a fixed vertex operator. As examples, one such sequence is given by Jack polynomials for rectangular Young diagrams, while another chain starts with any two-column Jack polynomial.
Keywords
Cite
@article{arxiv.nlin/0202037,
title = {Rational solutions to the Pfaff lattice and Jack polynomials},
author = {Mark Adler and Vadim B. Kuznetsov and Pierre van Moerbeke},
journal= {arXiv preprint arXiv:nlin/0202037},
year = {2007}
}
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57 pages