English

Recovering functions from the Paley-Wiener amalgam space

Functional Analysis 2013-11-21 v1

Abstract

In this paper we show that functions from the Paley-Wiener amalgam space (PW,l1)={fL2(R):f^(ξ+2πm)L2([π,π])<}(PW,l^1)=\{f\in L^2(\mathbb{R}): \sum\|\hat{f}(\xi+2\pi m) \|_{L^2([-\pi,\pi])} < \infty\} enjoy similar recovery properties as the classical Paley-Wiener space. Specifically, if {ϕα(x):αA}\{\phi_\alpha(x): \alpha\in A\} is a regular family of interpolators and {xn:nZ}\{x_n: n\in \mathbb{Z}\} is a complete interpolating sequence for L2([π,π])L^2([-\pi,\pi]), then the family {e2πimxϕα(xxn):m,nZ,αA}\{ e^{2\pi i m x}\phi_{\alpha}(x-x_n): m,n\in \mathbb{Z}, \alpha\in A \} may be used to recover f(PW,l1)f\in(PW,l^1).

Keywords

Cite

@article{arxiv.1311.5169,
  title  = {Recovering functions from the Paley-Wiener amalgam space},
  author = {Jeff Ledford},
  journal= {arXiv preprint arXiv:1311.5169},
  year   = {2013}
}

Comments

5 pages

R2 v1 2026-06-22T02:11:31.059Z