Browsing by Author "Marta Ayele"

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    Growth Estimate of Composition Operator on Hilbert Space of Dirichlet Series
    (Addis Ababa University, 2024-09) Marta Ayele; Hunduma Legesse
    Motivated by a theorem of Gordon and Hedenalm (1), the study of composition operators acting on various scales of function spaces of Dirichlet series has arisen intensive interest. In this thesis, we characterize the composition operators in Hilbert space and growth estimate of the composition operator in Hilbert space of Dirichlet series.