Reversible skew Laurent polynomial rings and deformations of Poisson automorphisms

Details Reversible skew Laurent polynomial rings and deformations of Poisson automorphisms Reversible skew Laurent polynomial rings and deformations of Poisson automorphisms

2007-08-29

arxiv.org/abs/0708.3923v1

Mathematics

Rings and Algebras

Scientific paper

A skew Laurent polynomial ring R[x^{\pm 1};\alpha] is reversible if it has a reversing automorphism, that is, an automorphism of period two that transposes x and x^{-1} and restricts to an automorphism of R. We study invariants for reversing automorphisms and apply our methods to determine the rings of invariants of reversing automorphisms of two simple skew Laurent polynomial rings, namely a localization of the enveloping algebra of the two-dimensional non-abelian solvable Lie algebra and the coordinate ring of the quantum torus. These two skew Laurent polynomial rings are deformations of Poisson algebras and we interpret their reversing automorphisms and their invariants as deformations of Poisson automorphisms and their invariants.

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