Exponential growth of norms in semigroups of linear automorphisms and Hausdorff dimension of self-projective IFS

Details Exponential growth of norms in semigroups of linear automorphisms and Hausdorff dimension of self-projective IFS Exponential growth of norms in semigroups of linear automorphisms and Hausdorff dimension of self-projective IFS

2012-04-01

arxiv.org/abs/1204.0250v1

Mathematics

Dynamical Systems

66 pages, 7 figures, 3 tables

Scientific paper

Given a finitely generated semigroup S of the (normed) set of linear maps of a vector space V into itself, we find sufficient conditions for the exponential growth of the number N(k) of elements of the semigroup contained in the sphere of radius k as k->infinity. We relate the growth rate lim log N(k)/log k to the exponent of a zeta function naturally defined on the semigroup and, in case S is a semigroup of volume-preserving automorpisms, to the Hausdorff and box dimensions of the limit set of the induced semigroup of automorphisms on the corresponding projective space.

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