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arXiv 0806.4152math.AGmath.AC
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多项式代数固定次数自同构的维数

Dimension of automorphisms with fixed degree for polynomial algebras

Vesselin Drensky, Jie-Tai Yu

摘要:

设$K[x,y]$是代数闭域$K$上的二元多项式代数.我们推广到任何特征的情况下的结果Furter,在一个领域的特征零的自同构$(f,g)$的$K[x,y]$,使$\max\{\text{deg}(f),\text{deg}(g)\}=n\geq 2$是可构造的维数$n+6$。对于自由结合代数$K< x,y>$的自同构也有同样的结果。我们还得到了Nielsen-Schreier代数簇中具有两个生成元的自由代数的类似结果。

英文摘要:

Let $K[x,y]$ be the polynomial algebra in two variables over an algebraically closed field $K$. We generalize to the case of any characteristic the result of Furter that over a field of characteristic zero the set of automorphisms $(f,g)$ of $K[x,y]$ such that $\max\{\text{deg}(f),\text{deg}(g)\}=n\geq 2$ is constructible with dimension $n+6$. The same result holds for the automorphisms of the free associative algebra $K< x,y>$. We have also obtained analogues for free algebras with two generators in Nielsen -- Schreier varieties of algebras.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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