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An impossibility theorem for linear symplectic circle quotients (1310.0414v1)
Published 1 Oct 2013 in math.SG, math.AC, and math.RT
Abstract: We prove that when $d>2$, a $d$-dimensional symplectic quotient at the zero level of a unitary circle representation $V$ such that $V{\Sp1}={0}$ cannot be $\Z$-graded regularly symplectomorphic to the quotient of a unitary representations of a finite group.
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