3 papers
math.FA2026
Universal operators: topology and consequences of ISP failure
João Carmo, Ben-Hur Eidt, Waleed Noor
Assuming a negative answer to the invariant subspace problem for separable complex Hilbert spaces, we prove that every universal operator has a continuum of minimal infinite-dimens…
math.FA2026
A Hardy-space operator acting on -zeros
Juan Manzur, Waleed Noor
A Hardy space approach to the Nyman-Beurling and Báez-Duarte criterion for the Riemann Hypothesis (RH) was introduced in [7]. It states that the RH holds if and only if the span of…
math.FA2024
Cyclicity of composition operators on the Paley-Wiener spaces
Pham Viet Hai, Waleed Noor, Osmar Reis Severiano
In this article we characterize the cyclicity of bounded composition operators on the Paley-Wiener spaces of entire functions for . We show that …