A two-matrix model is introduced whose 1/N expansion yields higher-genus Fuss-Catalan numbers for arbitrary p, together with sum rules and an explicit formula extending the Harer-Zagier result.
From Brezin-Hikami to Harer-Zagier formulas for Gaussian correlators
2 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Brezin-Hikami contour-integral representation of exponential multidensities in finite N Hermitian matrix model is a remarkable implication of the old Hermitian-Kontsevich duality. It is also a simplified version of Okounkov's formulas for the same multidensities in the cubic Kontsevich model and of Nekrasov calculus for LMNS integrals, a central piece of the modern studies of AGT relations. In this paper we use Brezin-Hikami representation to derive explicit expressions for the Harer-Zagier multidensities (from arXiv:0906.0036): the only known exhaustive generating functions of all-genera Gaussian correlators which are fully calculable and expressed in terms of elementary functions. Using the Brezin-Hikami contour integrals, we rederive the 1-point function of Harer and Zagier and the 2-point arctangent function of arXiv:0906.0036. We also present (without a proof) the explicit expression for the 3-point function in terms of arctangents. Derivation of the 3-point and higher Harer-Zagier functions remains a challenging problem.
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UNVERDICTED 2representative citing papers
Authors introduce the HZ character expansion of the HOMFLY-PT polynomial, identify hook diagrams for factorisability, and construct an infinite family of HZ-factorisable hyperbolic knots via full, partial-full, and Jucys-Murphy twists, plus a decomposition conjecture proven for three strands.
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The HZ character expansion and a hyperbolic extension of torus knots
Authors introduce the HZ character expansion of the HOMFLY-PT polynomial, identify hook diagrams for factorisability, and construct an infinite family of HZ-factorisable hyperbolic knots via full, partial-full, and Jucys-Murphy twists, plus a decomposition conjecture proven for three strands.