10 research outputs found

    Reflexivity on Banach Spaces of Analytic Functions

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    . Let X be a Banach space of functions analytic on a plane domain Ω such that for every λ in Ω the functional of evaluation at λ is bounded. Assume further that X contains the constants and admits multiplication by the independent variable z, Mz, as a bounded operator. We give sufficient conditions for Mz to be reflexive

    Weighted Sequence Spaces and Cyclicity

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    In this paper we investigate the cyclicity of the multiplication operator Mz acting on the weighted Hardy spaces of formal Laurent series. AMS Subject Classification: Primary 47B37; Secondary 47A16. Keywords and Phrases: Banach space of Laurent series associated with a sequence β, cyclic vector, multiplication operator, disc algebra

    Supercyclicity with Respect to a Sequence on Special Sequence Spaces

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    Let {β(n)}∞ n=−∞ be a sequence of positive numbers such that β(0) = 1 and let 1 < p < ∞. We consider the space of all formal Laurent series f(z) = P∞ n=−∞ ˆf(n)z n such that X∞ n=−∞ | ˆf(n)| pβ(n) p < ∞. We investigate the supercyclicity with respect to a sequence on the Banach spaces of formal Laurent serie

    Pediculosis capitis among school-age students worldwide as an emerging public health concern: a systematic review and meta-analysis of past five decades

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