Bispectral and $(\glN,\glM)$ Dualities

Details Bispectral and $(\glN,\glM)$ Dualities Bispectral and $(\glN,\glM)$ Dualities

2005-10-18

arxiv.org/abs/math/0510364v1

Mathematics

Quantum Algebra

Scientific paper

Let $V = < p_{ij}(x)e^{\la_ix}, i=1,...,n, j=1, ..., N_i >$ be a space of quasi-polynomials of dimension $N=N_1+...+N_n$. Define the regularized fundamental operator of $V$ as the polynomial differential operator $D = \sum_{i=0}^N A_{N-i}(x)\p^i$ annihilating $V$ and such that its leading coefficient $A_0$ is a polynomial of the minimal possible degree. We construct a space of quasi-polynomials $U = < q_{ab}(u)e^{z_au} >$ whose regularized fundamental operator is the differential operator $\sum_{i=0}^N u^i A_{N-i}(\partial_u)$. The space $U$ is constructed from $V$ by a suitable integral transform. Our integral transform corresponds to the bispectral involution on the space of rational solutions (vanishing at infinity) to the KP hierarchy, see \cite{W}. As a corollary of the properties of the integral transform we obtain a correspondence between critical points of the two master functions associated with the $(\glN,\glM)$ dual Gaudin models as well as between the corresponding Bethe vectors.

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