Riemann-Hilbert problem and the discrete Bessel kernel

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We use discrete analogs of Riemann-Hilbert problem's methods to derive the discrete Bessel kernel which describes the poissonized Plancherel measures for symmetric groups. To do this we define discrete analogs of a Riemann-Hilbert problem and of an integrable integral operator and show that computing the resolvent of a discrete integrable operator can be reduced to solving a corresponding discrete Riemann-Hilbert problem. We also give an example, explicitly solvable in terms of classical special functions, when a discrete Riemann-Hilbert problem converges in a certain scaling limit to a conventional one; the example originates from the representation theory of the infinite symmetric group.
AMSTeX, 23 pages. Formalism of general discrete integrable operators has been added

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Combinatorics, High Energy Physics - Theory, Mathematical Physics, Exactly Solvable and Integrable Systems

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http://salesiana.dossiersoluciones.com/handle/123456789/79589

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9912093
 http://arxiv.org/abs/math/9912093

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arXiv