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Listar por autor "Cobollo Gómez, Christian"

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Listar por autor "Cobollo Gómez, Christian"

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    Banach spaces with small weakly open subsets of the unit ball and massive sets of Daugavet and Delta-points 
    Cobollo-Gómez, Christian; Isert, Daniel; López-Pérez, Ginés; Martin, Miguel; Perreau, Yoël; Quero, Alicia; Quilis, Andrés; Rodríguez-Vidanes, D. L.; Rueda Zoca, Abraham (Springer-Verlag, 2024-07)
    [EN] We prove that there exists an equivalent norm vertical bar vertical bar vertical bar center dot vertical bar vertical bar vertical bar on L-infinity[0,1] with the following properties:; (1) The unit ball of (L-infinity[0,1], ...
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    Notes on differentiability, norm-preserving extensions, and renormings in Banach spaces 
    Cobollo Gómez, Christian (Universitat Politècnica de València, 2020-10-26)
    [ES] Renormar un espacio de Banach consiste en definir en él una norma que genere la misma topología. Dos normas que generan la misma topología se dice que son equivalentes. Se busca que la norma equivalente tenga mejores ...
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    Octahedrality and Gâteaux smoothness 
    Cobollo-Gómez, Christian; Hájek, P. (Elsevier, 2025-03-15)
    [EN] We prove that every Banach space admitting a Gâteaux smooth norm and containing a complemented copy of I1 has an equivalent renorming which is simultaneously Gâteaux smooth and octahedral. This is a partial solution ...
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    On the strongly subdifferentiable points in Lipschitz-free spaces 
    Cobollo-Gómez, Christian; Sheldon Dantas; Hájek, Petr; Jung, Mingu (2025-01)
    [EN] In this paper, we present some sufficient conditions on a metric space M for which every molecule is a strongly subdifferentiable (SSD, for short) point in the Lipschitz- free space F(M) over M. Our main result reads ...
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    The numerical index of 2-dimensional Lipschitz-free spaces 
    Cobollo-Gómez, Christian; Guirao Sánchez, Antonio José; Montesinos Santalucia, Vicente (Elsevier, 2024-10-01)
    [EN] We provide the explicit formula for the numerical index of any 2 -dimensional Lipschitz-free space, also giving the construction of operators attaining this value as its numerical radius. As a consequence, the numerical ...