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Listar por autor "RICKER, WERNER"

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Listar por autor "RICKER, WERNER"

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    Characterizing Fréchet-Schwartz spaces via power bounded operators 
    Albanese, Angela A.; Bonet Solves, José Antonio; Ricker, Werner Joseph (Polskiej Akademii Nauk, Instytut Matematyczny (Polish Academy of Sciences, Institute of Mathematics), 2014-09-29)
    [EN] We characterize Köthe echelon spaces (and, more generally, those Fréchet spaces with an unconditional basis) which are Schwartz, in terms of the convergence of the Cesàro means of power bounded operators defined on ...
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    Mean ergodic operators and reflexive Fréchet lattices 
    Bonet Solves, José Antonio; de Pagter, Ben; Ricker, Werner Joseph (2011-09-26)
    Connections between (positive) mean ergodic operators acting in Banach lattices and properties of the underlying lattice itself are well understood (see the works of Emel'yanov, Wolff and Zaharopol). For Frechet lattices ...
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    Mean ergodic semigroups of operators 
    Albanese, Angela Anna; Bonet Solves, José Antonio; Ricker, Werner Joseph (Springer Verlag (Germany), 2012-09)
    We present criteria for determining mean ergodicity of C 0-semigroups of linear operators in a sequentially complete, locally convex Hausdorff space X. A characterization of reflexivity of certain spaces X with a basis via ...
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    Montel resolvents and uniformly mean ergodic semigroups of linear operators 
    Albanese, Angela Anna; Bonet Solves, José Antonio; Ricker, Werner Joseph (Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2013-05)
    For C-0-semigroups of continuous linear operators acting in a Banach space criteria are available which are equivalent to uniform mean ergodicity of the semigroup, meaning the existence of the limit (in the operator norm) ...
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    On the continuous Cesàro operator in certain function spaces 
    Albanese, Angela A.; Bonet Solves, José Antonio; Ricker, Werner Joseph (Springer Verlag (Germany), 2015)
    Various properties of the (continuous) Cesàro operator C, acting on Banach and Fréchet spaces of continuous functions and L p-spaces, are investigated. For instance, the spectrum and point spectrum of C are completely ...
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    Operators acting in the dual spaces of discrete Cesàro spaces 
    Bonet Solves, José Antonio; RICKER, WERNER (Springer-Verlag, 2020-03)
    [EN] The discrete Cesaro (Banach) sequence spaces ces(r),1<r<infinity, have been thoroughly investigated for over 45 years. Not so for their dual spaces d(s) approximately equal to (ces(r))', which are somewhat unwieldy. ...
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    Uniform mean ergodicity of C0-semigroups in a class of Fréchet spaces 
    Albanese, Angela A.; Bonet Solves, José Antonio; Ricker, Werner Joseph (Adam Miekiewicz University. Faculty of Mathematics and Computer Science, 2014)
    [EN] Let (T(t))t>0 be a strongly continuous C0-semigroup of bounded linear operators on a Banach space X such that limt→∞ kT(t)/tk = 0. Characterizations of when (T(t))t>0 is uniformly mean ergodic, i.e., of when its ...