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arXiv 1010.4199math.GTmath.DSmath.KT
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同调挠增长与Mahler测度

Homology torsion growth and Mahler measure

Thang Le

摘要:

证明了K的一个猜想。Schmidt在代数动力系统理论中关于不动点集的分量数的增长。我们还推广了Silver和Williams关于链补的有限阿贝尔覆盖的同调挠增长的一个结果。在这两种情况下,增长都是由相应模的第一个非零Alexander多项式的Mahler测度表示的。我们利用伪同构的概念,以及交换代数和代数几何的工具,将这些问题归结到扭模的情形。我们还描述了具体的序列,在这两种情况下,给出了期望值的限制。在这一部分中,我们利用了Bjueri和Zannier的一个结果(A. Schinzel)和Lawton的结果(D. Boyd)。

英文摘要:

We prove a conjecture of K. Schmidt in algebraic dynamical system theory on the growth of the number of components of fixed point sets. We also generalize a result of Silver and Williams on the growth of homology torsions of finite abelian covering of link complements. In both cases, the growth is expressed by the Mahler measure of the first non-zero Alexander polynomial of the corresponding modules. We use the notion of pseudo-isomorphism, and also tools from commutative algebra and algebraic geometry, to reduce the conjectures to the case of torsion modules. We also describe concrete sequences which give the expected values of the limits in both cases. For this part we utilize a result of Bombieri and Zannier (conjectured before by A. Schinzel) and a result of Lawton (conjectured before by D. Boyd).

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