English

Time-frequency analysis on the adeles over the rationals

Functional Analysis 2022-10-21 v2 Operator Algebras

Abstract

We show that the construction of Gabor frames in L2(R)L^{2}(\mathbb{R}) with generators in S0(R)\mathbf{S}_{0}(\mathbb{R}) and with respect to time-frequency shifts from a rectangular lattice αZ×βZ\alpha\mathbb{Z}\times\beta\mathbb{Z} is equivalent to the construction of certain Gabor frames for L2L^{2} over the adeles over the rationals and the group R×Qp\mathbb{R}\times\mathbb{Q}_{p}. Furthermore, we detail the connection between the construction of Gabor frames on the adeles and on R×Qp\mathbb{R}\times\mathbb{Q}_{p} with the construction of certain Heisenberg modules.

Cite

@article{arxiv.1807.07011,
  title  = {Time-frequency analysis on the adeles over the rationals},
  author = {Ulrik B. R. Enstad and Mads S. Jakobsen and Franz Luef},
  journal= {arXiv preprint arXiv:1807.07011},
  year   = {2022}
}

Comments

minor revisions, added more references, added a Balian-Low type result in the form of Proposition 4.4

R2 v1 2026-06-23T03:06:03.869Z