The symplectic ideal and a double centraliser theorem

Details The symplectic ideal and a double centraliser theorem The symplectic ideal and a double centraliser theorem

2007-05-02

arxiv.org/abs/0705.0377v1

Mathematics

Commutative Algebra

Scientific paper

We interpret a result of S. Oehms as a statement about the symplectic ideal. We use this result to prove a double centraliser theorem for the symplectic group acting on \bigoplus_{r=0}^s\otimes^rV, where V is the natural module for the symplectic group. This result was obtained in characteristic zero by H. Weyl. Furthermore we use this to extend to arbitrary connected reductive groups G with simply connected derived group the earlier result of the author that the algebra K[G]^g of infinitesimal invariants in the algebra of regular functions on G is a unique factorisation domain.

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