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Listar por autor "Lacruz Martín, Miguel Benito"
Mostrando ítems 1-18 de 18
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Artículo
A local spectral condition for strong compactness with some applications to bilateral weighted shifts
Lacruz Martín, Miguel Benito; Romero de la Rosa, María del Pilar (American Mathematical Society, 2014-01)An algebra of bounded linear operators on a Banach space is said to be strongly compact if its unit ball is precompact ...
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El algoritmo alternante de von Neumann
Crespo Gallego, Ana (2020-09-10)The aim of this work is to study in depth the alternating algorithm proposed by John von Neumann in 1933. This algorithm ...
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Applications of fixed point theorems in the theory of invariant subspaces
Espínola García, Rafael; Lacruz Martín, Miguel Benito (2012) -
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La desigualdad de Von Neumann y la teoría de dilatación
Constantino Oitavén, Carlos (2018-09)A famous inequality by von Neumann states that if T is a contraction on a Hilbert space and p is a polynomial, then kp(T)k ...
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Essential norm of composition operators on Banach spaces of Hölder functions
Villegas Vallecillos, Moisés; Lacruz Martín, Miguel Benito; Jiménez Vargas, Antonio (2011)Let (X, d) be a pointed compact metric space, let 0 < α < 1, and let ϕ : X → X be a base point-preserving Lipschitz map. ...
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Extended eigenvalues for Cesàro operators
Lacruz Martín, Miguel Benito; León Saavedra, Fernando; Petrovic, Srdjan; Zabeti, Omid (Elsevier, 2015-09-15)A complex scalar λ is said to be an extended eigenvalue of a bounded linear operator T on a complex Banach space if there ...
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Extended eigenvalues of composition operators
Lacruz Martín, Miguel Benito; León Saavedra, Fernando; Petrovic, Srdjan; Rodríguez Piazza, Luis (Elsevier, 2021-12-15)A complex scalar λ is said to be an extended eigenvalue of a bounded linear operator A on a complex Hilbert space if there ...
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Extended eigenvalues of composition operators
Lacruz Martín, Miguel Benito; Leon Saavedra, Fernando; Petrovic, Srdjan; Rodríguez Piazza, Luis (Elsevier, 2021-12-15)A complex scalar λ is said to be an extended eigenvalue of a bounded linear operator A on a complex Hilbert space if there ...
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Function algebras with a strongly precompact unit ball
Lacruz Martín, Miguel Benito; Rodríguez Piazza, Luis (Elsevier, 2013-10-01)Let µ be a finite positive Borel measure with compact support K ⊆ C, and regard L∞(µ) as an algebra of multiplication ...
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Hardy-Littlewood inequalities for norms of positive operators on sequence spaces
Lacruz Martín, Miguel Benito (Elsevier, 2013-01-01)We consider estimates of Hardy and Littlewood for norms of operators on sequence spaces, and we apply a factorization result of Maurey to obtain improved estimates and simplified proofs for the special case of a positive operator.
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Una introducción a la teoría de los subespacios invariantes
Constantino Oitavén, Carlos (2017-06)Halmos says that one of the most recalcitrant unsolved problems in operator theory is the invariant subspace problem. The ...
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Invariant subspaces and Deddens algebras
Lacruz Martín, Miguel Benito (Elsevier, 2015)It is shown that if the Deddens algebra DT associated with a quasinilpotent operator T on a complex Banach space is closed and localizing then T has a nontrivial closed hyperinvariant subspace.
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Normas de multiplicadores de Schur y truncación triangular de matrices
Aguilar Reyes, Álvaro (2020-06-18)A main topic in matrix analysis is the computation of the norms of Schur multipliers in the algebra of square matrices. The ...
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Operadores absolutamente sumantes
Ornedo Muñoz, Moisés (2022-06-22)The objective of this work is to introduce ourselves to the theory of absolutely summing operators, giving an overview ...
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Operadores de composición y clases de Schatten
González Doña, Francisco Javier (2018)The main goal of this work is to characterize the membership of composition operators on the Hardy space H2 of the unit ...
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Operadores esencialmente normales y existencia de subespacios invariantes
Aguilar Reyes, Álvaro (2021-06-28)A main problem of Operator Theory consists of studying which operators have an invariant subspace, or what properties ...
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Operadores universales y subespacios invariantes
González Doña, Francisco Javier (2019)The Invariant Subspace Problem is one of the most studied problems on Operator Theory in the last decades. In fact, it is ...
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Strongly compact algebras
Lacruz Martín, Miguel Benito; Lomonosov, Victor; Rodríguez Piazza, Luis (Real Academia de Ciencias Exactas, Fisicas y Naturales, 2006)An algebra of bounded linear operators on a Hilbert space is said to be strongly compact if its unit ball is relatively ...