Contractive projections in Paley-Wiener spaces
Original version
Kulikov, A., & Zlotnikov, I. (2023). Contractive projections in Paley-Wiener spaces. Proceedings of the American Mathematical Society, 151(04), 1637-1641. 10.1090/proc/16336Abstract
Let S1 and S2 be disjoint finite unions of parallelepipeds. We describe necessary and sufficient conditions on the sets S1, S2 and exponents p such that the canonical projection P from PWPS1US2 to PWPS1 is a contraction.