S. Noor

activity

20122020

collaborators

5 papers

math.FA2020

Interplay between complex symmetry and Koenigs eigenfunctions

S. Waleed Noor, Osmar R. Severiano

We investigate the relationship between the complex symmetry of composition operators $C_{ϕ} f = f \circ ϕ$ induced on the classical Hardy space $H^{2} (D)$ by an analytic self-map…

math.FA2020

Universal Toeplitz operators on the Hardy space over the polydisk

Marcos Ferreira, S. Waleed Noor

The Invariant Subspace Problem (ISP) for Hilbert spaces asks if every bounded linear operator has a non-trivial closed invariant subspace. Due to the existence of universal operato…

math.FA2019

Universal composition operators

João R. Carmo, S. Waleed Noor

A Hilbert space operator $U$ is called universal (in the sense of Rota) if every Hilbert space operator is similar to a multiple of $U$ restricted to one of its invariant subspaces…

math.FA2019

Complex symmetry and cyclicity of composition operators on $H^{2} (C_{+})$

S. Waleed Noor, Osmar R. Severiano

In this article, we completely characterize the complex symmetry, cyclicity and hypercyclicity of composition operators $C_{ϕ} f = f \circ ϕ$ induced by affine self-maps $ϕ$ of the right…

math.FA2012

Complex symmetry of Composition operators induced by involutive Ball automorphisms

S. Waleed Noor

Suppose $H$ is a weighted Hardy space of analytic functions on the unit ball $B_{n} \subset C^{n}$ such that the composition operator $C_{ψ}$ defined by $C_ψf=f…

Interplay between complex symmetry and Koenigs eigenfunctions

Universal Toeplitz operators on the Hardy space over the polydisk

Universal composition operators

Complex symmetry and cyclicity of composition operators on H2(C+​)

Complex symmetry of Composition operators induced by involutive Ball automorphisms

Complex symmetry and cyclicity of composition operators on $H^{2} (C_{+})$