The Newman--Shapiro problem
Complex Variables
2021-07-09 v3 Functional Analysis
Abstract
We give a negative answer to the Newman--Shapiro problem on weighted approximation for entire functions formulated in 1966 and motivated by the theory of operators on the Fock space. There exists a function in the Fock space such that its exponential multiples do not approximate some entire multiples in the space. Furthermore, we establish several positive results under different restrictions on the function in question.
Cite
@article{arxiv.1711.06901,
title = {The Newman--Shapiro problem},
author = {Yurii Belov and Alexander Borichev},
journal= {arXiv preprint arXiv:1711.06901},
year = {2021}
}
Comments
30 pages, accepted for publication in JEMS