首页> 外文期刊>Journal of algebra and its applications >REVERSIBLE SKEW LAURENT POLYNOMIAL RINGS AND DEFORMATIONS OF POISSON AUTOMORPHISMS
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REVERSIBLE SKEW LAURENT POLYNOMIAL RINGS AND DEFORMATIONS OF POISSON AUTOMORPHISMS

机译:可逆扭Laurent多项式环和泊松自构形变

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A skew Laurent polynomial ring S = R[x(+/- 1); alpha] is reversible if it has a reversing automorphism, that is, an automorphism theta of period 2 that transposes x and x(-1) and restricts to an automorphism gamma of R with gamma = gamma(-1). We study invariants for reversing automorphisms and apply our methods to determine the rings of invariants of reversing automorphisms of the two most familiar examples of 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, both of which are deformations of Poisson algebras over the base field F. Their reversing automorphisms are deformations of Poisson automorphisms of those Poisson algebras. In each case, the ring of invariants of the Poisson automorphism is the coordinate ring B of a surface in F-3 and the ring of invariants S-theta of the reversing automorphism is a deformation of B and is a factor of a deformation of F[x(1), x(2), x(3)] for a Poisson bracket determined by the appropriate surface.
机译:偏洛朗多项式环S = R [x(+/- 1);如果具有反向自同构性,即周期2的自同构theta转置x和x(-1)并限制为R的自构伽玛为gamma = gamma(-1),则它是可逆的。我们研究了可逆自同构的不变量,并应用我们的方法来确定两个最常见的简单偏斜洛朗多项式环实例的可逆自同构的不变量环,即二维不可阿贝尔可解李代数的包络代数的局部化以及量子环的坐标环,它们都是基数F上的泊松代数的变形。它们的可逆自同构是那些泊松代数的泊松自同构的变形。在每种情况下,泊松自同构的不变量环是F-3中表面的坐标环B,而逆向同构的不变量S-theta环是B的变形,并且是F变形的因素由适当曲面确定的泊松括号的[x(1),x(2),x(3)]。

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