A conjecture of Mallows and Sloane with the universal denominator of Hilbert series
OPEN MATHEMATICS(2024)
Abstract
A conjecture of Mallows and Sloane conveys the dominance of Hilbert series for finding basic invariants of finite linear groups if the Hilbert series of the invariant ring is of a certain explicit canonical form. However, the conjecture does not hold in general by a well-known counterexample of Stanley. In this article, we give a constraint on lower bounds for the degrees of homogeneous system of parameters of rings of invariants of finite linear groups depending on the universal denominator of Hilbert series defined by Derksen. We consider the conjecture with the universal denominator on abelian groups and provide some criteria guaranteeing the existence of homogeneous system of parameters of certain degrees. In this case, Stanley's counterexample could be avoided, and the homogeneous system of parameters is optimal.
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Key words
Stanley's counterexample,Molien's theorem,optimal homogeneous system of parameters
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