English

On the growth of Fourier multipliers

Functional Analysis 2021-10-28 v2 Group Theory Operator Algebras

Abstract

We define a sequence of functions, namely tame cuts, in the Fourier algebra A(G)A(G) of a locally compact group GG, that satisfies certain convergence and growth conditions. This new consideration allows us to give a group admitting a Fourier multiplier that is not completely bounded. Furthermore, we show that the induction map MA(Γ)MA(G)MA(\Gamma)\rightarrow MA(G) is not always continuous. We also show how Liao's Property (TSchur,G,K)(T_{Schur}, G, K) opposes tame cuts. Some examples are provided.

Keywords

Cite

@article{arxiv.2011.00146,
  title  = {On the growth of Fourier multipliers},
  author = {Bat-Od Battseren},
  journal= {arXiv preprint arXiv:2011.00146},
  year   = {2021}
}

Comments

17 pages. Theorem D, Section 2.4, Section 6, and Acknowledgements are added