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Algebra i Analiz, 2025 Volume 37, Issue 3, Pages 1–21 (Mi aa1962)

Research Papers

Exponential approximation and meromorphic interpolation

Yu. Belova, A. Borichevb, A. Kuznetsova

a Department of Mathematics and Computer Science, St. Petersburg State University, St. Petersburg, Russia
b Institut de Mathématiques de Marseille, Aix Marseille Université, CNRS, I2M, Marseille, France

Abstract: The relationship is established between the approximation in $L^2[-\pi,\pi]$ by exponentials with the set of frequencies of Beurling–Malliavin density less than $1$ and meromorphic interpolation on $\mathbb Z$. Furthermore, it is shown that typical $L^2[-\pi,\pi]$ functions admit such an approximation.

Keywords: Paley–Wiener space, exponential systems, approximation theory, interpolation by meromorphic functions.

Received: 23.10.2024

Language: English



© Steklov Math. Inst. of RAS, 2025