Bounded common fundamental domains for two lattices
Classical Analysis and ODEs
2025-12-01 v2 Metric Geometry
Abstract
We prove that for any two lattices of the same volume there exists a measurable, bounded, common fundamental domain of them. In other words, there exists a bounded measurable set such that tiles when translated by or by . In fact, the set can be taken to be a finite union of polytopes. A consequence of this is that the indicator function of forms a Weyl--Heisenberg (Gabor) orthogonal basis of when translated by and modulated by , the dual lattice of .
Cite
@article{arxiv.2507.00604,
title = {Bounded common fundamental domains for two lattices},
author = {Sigrid Grepstad and Mihail N. Kolountzakis},
journal= {arXiv preprint arXiv:2507.00604},
year = {2025}
}
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13 pages