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arXiv · 2606.30629

Rauzy-Veech Induction for Infinite-Type IETs

Charles Fougeron·Sophie Schmidhuber
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Abstract

We consider infinite-type IETs arising from elementary examples of finite-area translation surfaces of infinite genus such as the Baker's surface. We call such IETs tail-reversing and we show that for any tail-reversing permutation the subset of the simplex of lengths $\Delta$ for which the corresponding infinite-type IET is uniquely ergodic contains a dense $G_{\delta}$ set with respect to the $\ell^1$-topology. To this end, we generalize Rauzy-Veech induction to a large class of infinite-type IETs, where we prove a minimality criterion as a generalization of Keane's criterion in the finite setting. We then restrict ourselves to tail-reversing IETs and obtain our genericity result through a combinatorial analysis of their infinite-type Rauzy diagrams. Moreover, we derive an explicit condition for a tail-reversing IET to be uniquely ergodic by studying the diameter of its induction matrices.

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Charles Fougeron, Sophie Schmidhuber. 2026-06-29. Rauzy-Veech Induction for Infinite-Type IETs. https://arxiv.org/abs/2606.30629

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