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arXiv math/0003127math.GTmath.DS
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Mahler测度、链环与同调增长

Mahler measure, links and homology growth

Daniel S. Silver, Susan G. Williams

摘要:

设l为d个分量的链环。对于Z^d中的每一个有限指标格,都有一个在l上分支的S^3的有限阿贝尔覆盖。我们证明了这些覆盖的第一同调的挠子群的阶具有等于l的Alexander多项式的对数Mahler测度的指数增长性,只要该多项式非零.我们的证明使用了林德,施密特和沃德定理的增长率的周期点代数Z^d-行动的连接组件。

英文摘要:

Let l be a link of d components. For every finite-index lattice in Z^d there is an associated finite abelian cover of S^3 branched over l. We show that the order of the torsion subgroup of the first homology of these covers has exponential growth rate equal to the logarithmic Mahler measure of the Alexander polynomial of l, provided this polynomial is nonzero. Our proof uses a theorem of Lind, Schmidt and Ward on the growth rate of connected components of periodic points for algebraic Z^d-actions.

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