On Factorization of Generalized Macdonald Polynomials

Ya. Kononov; A. Morozov

doi:10.1140/epjc/s10052-016-4276-5

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arXiv · 1607.00615

On Factorization of Generalized Macdonald Polynomials

Ya. Kononov·A. Morozov

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Abstract

A remarkable feature of Schur functions -- the common eigenfunctions of cut-and-join operators from $W_\infty$ -- is that they factorize at the peculiar two-parametric topological locus in the space of time-variables, what is known as the hook formula for quantum dimensions of representations of $U_q(SL_N)$ and plays a big role in various applications. This factorization survives at the level of Macdonald polynomials. We look for its further generalization to {\it generalized} Macdonald polynomials (GMP), associated in the same way with the toroidal Ding-Iohara-Miki algebras, which play the central role in modern studies in Seiberg-Witten-Nekrasov theory. In the simplest case of the first-coproduct eigenfunctions, where GMP depend on just two sets of time-variables, we discover a weak factorization -- on a codimension-one slice of the topological locus, what is already a very non-trivial property, calling for proof and better understanding.

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Ya. Kononov, A. Morozov. 2016-09-08. On Factorization of Generalized Macdonald Polynomials. https://doi.org/10.1140/epjc%2Fs10052-016-4276-5

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