We develop a thermodynamic formalism for quasi-multiplicative potentials on a countable symbolic space and apply these results to the dimension theory of infinitely generated self-affine sets. The first application is a generalisation of Falconer's dimension formula to include typical infinitely generated self-affine sets and show the existence of an ergodic invariant measure of full dimension whenever the pressure function has a root. Considering the multifractal analysis of Birkhoff averages of general potentials taking values in , we give a formula for the Hausdorff dimension of , the -level set of the Birkhoff average, on a typical infinitely generated self-affine set. We also show that for bounded potentials , the Hausdorff dimension of is given by the maximum of the critical value for the pressure and the supremum of Lyapunov dimensions of invariant measures for which . Our multifractal results are new in both the finitely generated and the infinitely generated setting.
Cite this article
Antti Käenmäki, Henry W. J. Reeve, Multifractal analysis of Birkhoff averages for typical infinitely generated self-affine sets. J. Fractal Geom. 1 (2014), no. 1, pp. 83–152DOI 10.4171/JFG/3