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Hilbert-Schmidtness of weighted composition operators and their differences on Hardy spaces

Lo Ching-on, Loh Anthony Wai-keung

Opuscula Mathematica

2020

Vol. 40, no. 4

495--507

Let u and φ be two analytic functions on the unit disk D such that φ (D) ⊂ D. A weighted composition operator uCφ induced by u and φ is defined on H2, the Hardy space of D, by [formula] for every ∫ in H2. We obtain sufficient conditions for Hilbert-Schmidtness of v,Cv on H2 in terms of function-theoretic properties of u and φ. Moreover, we characterize Hilbert-Schmidt difference of two weighted composition operators on H2.