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arxiv: 1110.1946 · v2 · pith:63LEUP5Anew · submitted 2011-10-10 · 🧮 math.RT · hep-th· math-ph· math.DG· math.MP· math.QA· nlin.SI

Singular polynomials from orbit spaces

classification 🧮 math.RT hep-thmath-phmath.DGmath.MPmath.QAnlin.SI
keywords polynomialssingularparameterrepresentationconstantcoxeterdegreeorbit
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We consider the polynomial representation S(V*) of the rational Cherednik algebra H_c(W) associated to a finite Coxeter group W at constant parameter c. We show that for any degree d of W and nonnegative integer m the space S(V*) contains a single copy of the reflection representation V of W spanned by the homogeneous singular polynomials of degree d-1+hm, where h is the Coxeter number of W; these polynomials generate an H_c(W) submodule with the parameter c=(d-1)/h+m. We express these singular polynomials through the Saito polynomials that are flat coordinates of the Saito metric on the orbit space V/W. We also show that this exhausts all the singular polynomials in the isotypic component of the reflection representation V for any constant parameter c.

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