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Displaying 1281 – 1300 of 3166

Martingale operators and Hardy spaces generated by them

Ferenc Weisz (1995)

Studia Mathematica

Martingale Hardy spaces and BMO spaces generated by an operator T are investigated. An atomic decomposition of the space $H_{p}^{T}$ is given if the operator T is predictable. We generalize the John-Nirenberg theorem, namely, we prove that the $B M O_{q}$ spaces generated by an operator T are all equivalent. The sharp operator is also considered and it is verified that the $L_{p}$ norm of the sharp operator is equivalent to the $H_{p}^{T}$ norm. The interpolation spaces between the Hardy and BMO spaces are identified by the real method....

Martingales, G...-Embeddings and Quotients of L1 .

N. Ghoussoub, H.P. Rosenthal (1983)

Mathematische Annalen

Matrices of positive polynomials.

Handelman, David (2009)

ELA. The Electronic Journal of Linear Algebra [electronic only]

Matrix subspaces of L₁

Gideon Schechtman (2013)

Studia Mathematica

If $E = e_{i}$ and $F = f_{i}$ are two 1-unconditional basic sequences in L₁ with E r-concave and F p-convex, for some 1 ≤ r < p ≤ 2, then the space of matrices $a_{i, j}$ with norm $| | a_{i, j} {| |}_{E (F)} = | | \sum_{k} | | \sum_{l} a_{k, l} f_{l} | | e_{k} | |$ embeds into L₁. This generalizes a recent result of Prochno and Schütt.

Matrix transformations and generators of analytic semigroups.

de Malafosse, Bruno, Medeghri, Ahmed (2006)

Journal of Inequalities and Applications [electronic only]

Matrix transformations between the sequence space Bv^p and certain bk spaces

E. Malkowsky, V. Rakočević, Snežana Živković (2002)

Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques

Maximal additive and maximal multiplicative family for the family of $ℬ$ -Darboux Baire one functions

Ladislav Mišík (1981)

Mathematica Slovaca

Mazur spaces.

Wilansky, Albert (1981)

International Journal of Mathematics and Mathematical Sciences

Mazur-Ulam Theorem

Artur Korniłowicz (2011)

Formalized Mathematics

The Mazur-Ulam theorem [15] has been formulated as two registrations: cluster bijective isometric -> midpoints-preserving Function of E, F; and cluster isometric midpoints-preserving -> Affine Function of E, F; A proof given by Jussi Väisälä [23] has been formalized.

M-bases in spaces of continuous functions on ordinals

Ondrej F. K. Kalenda (2002)

Colloquium Mathematicae

We prove, among other things, that the space C[0,ω₂] has no countably norming Markushevich basis. This answers a question asked by G. Alexandrov and A. Plichko.

M-complete approximate identities in operator spaces

A. Arias, H. Rosenthal (2000)

Studia Mathematica

This work introduces the concept of an M-complete approximate identity (M-cai) for a given operator subspace X of an operator space Y. M-cai’s generalize central approximate identities in ideals in C*-algebras, for it is proved that if X admits an M-cai in Y, then X is a complete M-ideal in Y. It is proved, using ’special’ M-cai’s, that if J is a nuclear ideal in a C*-algebra A, then J is completely complemented in Y for any (isomorphically) locally reflexive operator space Y with J ⊂ Y ⊂ A and...

Mean Ergodicity of Power-Bounded Operators in Countably Order Complete Banach Lattices.

Radu Zaharopol (1986)

Mathematische Zeitschrift

Means on $C V_{p} (G)$ -subspaces of $C V_{p} (G)$ with RNP and Schur property

Françoise Lust-Piquard (1989)

Annales de l'institut Fourier

Let $G$ be a locally compact abelian group and $C V_{p} (G)$ $(1 \leq p \leq 2)$ be the space of bounded convolution...

Means with values in a Banach lattice.

Chivukula, R.Rao, Sarma, I.Ramabhadra (1987)

International Journal of Mathematics and Mathematical Sciences

Measurability of linear operators in the Skorokhod topology.

Pestman, Wiebe R. (1995)

Bulletin of the Belgian Mathematical Society - Simon Stevin

Measure of noncompactness of operators and matrices on the spaces $c$ and $c_{0}$ .

De Malafosse, Bruno, Malkowsky, Eberhard, Rakočević, Vladimir (2006)

International Journal of Mathematics and Mathematical Sciences

Measure of non-compactness of operators interpolated by the real method

Radosław Szwedek (2006)

Studia Mathematica

We study the measure of non-compactness of operators between abstract real interpolation spaces. We prove an estimate of this measure, depending on the fundamental function of the space. An application to the spectral theory of linear operators is presented.

Measure of weak noncompactness under complex interpolation

Andrzej Kryczka, Stanisław Prus (2001)

Studia Mathematica

Logarithmic convexity of a measure of weak noncompactness for bounded linear operators under Calderón’s complex interpolation is proved. This is a quantitative version for weakly noncompact operators of the following: if T: A₀ → B₀ or T: A₁ → B₁ is weakly compact, then so is $T : A_{[θ]} \to B_{[θ]}$ for all 0 < θ < 1, where $A_{[θ]}$ and $B_{[θ]}$ are interpolation spaces with respect to the pairs (A₀,A₁) and (B₀,B₁). Some formulae for this measure and relations to other quantities measuring weak noncompactness are established.

Measures of noncircularity and fixed points of contractive multifunctions.

Marrero, Isabel (2010)

Fixed Point Theory and Applications [electronic only]

Measures of noncompactness and normal structure in Banach spaces

J. García-Falset, A. Jiménez-Melado, E. Lloréns-Fuster (1994)

Studia Mathematica

Sufficient conditions for normal structure of a Banach space are given. One of them implies reflexivity for Banach spaces with an unconditional basis, and also for Banach lattices.

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