Homology torsion growth and Mahler measure

Details Homology torsion growth and Mahler measure Homology torsion growth and Mahler measure

2010-10-20

arxiv.org/abs/1010.4199v2

Mathematics

Geometric Topology

24 pages

Scientific paper

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 prove a related conjecture 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 conjectures. 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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