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arXiv math-ph/0303026math-phmath.MP
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变形Calogero-Moser系统的拟不变量和量子积分

Quasi-invariants and quantum integrals of the deformed Calogero--Moser systems

M. Feigin, A. P. Veselov

摘要:

研究了与变形根系${\cal A}_n(m)$和${\cal C}_n(m,l)$有关的广义Calogero-Moser系统的量子积分环及相应的拟不变量代数.特别地,证明了这些代数是非线性生成的,并且作为某些多项式子代数上的模是自由的(Cohen-Macaulay性质)。证明如下的计划提出的Etingof和Ginzburg在Coxeter的情况下。对于二维系统,相应的庞加莱级数和变形的$m$ -调和多项式显式计算。

英文摘要:

The rings of quantum integrals of the generalized Calogero-Moser systems related to the deformed root systems ${\cal A}_n(m)$ and ${\cal C}_n(m,l)$ with integer multiplicities and corresponding algebras of quasi-invariants are investigated. In particular, it is shown that these algebras are finitely generated and free as the modules over certain polynomial subalgebras (Cohen-Macaulay property). The proof follows the scheme proposed by Etingof and Ginzburg in the Coxeter case. For two-dimensional systems the corresponding Poincare series and the deformed $m$-harmonic polynomials are explicitly computed.

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