Bethe algebra and algebra of functions on the space of differential operators of order two with polynomial solutions

Details Bethe algebra and algebra of functions on the space of differential operators of order two with polynomial solutions Bethe algebra and algebra of functions on the space of differential operators of order two with polynomial solutions

2007-05-28

arxiv.org/abs/0705.4114v1

Mathematics

Quantum Algebra

Scientific paper

We show that the following two algebras are isomorphic. The first is the algebra $A_P$ of functions on the scheme of monic linear second-order differential operators on $\C$ with prescribed regular singular points at $z_1,..., z_n, \infty$, prescribed exponents $\La^{(1)}, ..., \La^{(n)}, \La^{(\infty)}$ at the singular points, and having the kernel consisting of polynomials only. The second is the Bethe algebra of commuting linear operators, acting on the vector space $\Sing L_{\La^{(1)}} \otimes ... \otimes L_{\La^{(n)}}[\La^{(\infty)}]$ of singular vectors of weight $\La^{(\infty)}$ in the tensor product of finite dimensional polynomial $gl_2$-modules with highest weights $\La^{(1)},..., \La^{(n)}$.

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