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Displaying 761 – 780 of 11135

A sufficient condition for the boundedness of operator-weighted martingale transforms and Hilbert transform

Sandra Pot (2007)

Studia Mathematica

Let W be an operator weight taking values almost everywhere in the bounded positive invertible linear operators on a separable Hilbert space . We show that if W and its inverse $W^{- 1}$ both satisfy a matrix reverse Hölder property introduced by Christ and Goldberg, then the weighted Hilbert transform $H : L ²_{W} (ℝ,) \to L ²_{W} (ℝ,)$ and also all weighted dyadic martingale transforms $T_{σ} : L ²_{W} (ℝ,) \to L ²_{W} (ℝ,)$ are bounded. We also show that this condition is not necessary for the boundedness of the weighted Hilbert transform.

A sufficient condition for the Carasso-Kato theorem.

Yasuhiro Fujita (1993)

Mathematische Annalen

A sufficient condition for the Carasso-Kato theorem (Erratum).

Yasuhiro Fujita (1994)

Mathematische Annalen

A sufficient condition of type (...) for Tame Splitting of short exact sequences of Fréchet spaces.

Markus Poppenberg (1991)

Manuscripta mathematica

A superquadratic method for solving variational inclusions under weak conditions.

Jean-Alexis, Célia, Piétrus, Alain (2008)

Applied Mathematics E-Notes [electronic only]

A survey and some new results on the existence of solutions of IPBVPs for first order functional differential equations

Yuji Liu (2009)

Applications of Mathematics

This paper deals with the periodic boundary value problem for nonlinear impulsive functional differential equation $\{\begin{matrix} x^{'} (t) = f (t, x (t), x (α_{1} (t)), \dots, x (α_{n} (t))) for a.e. t \in [0, T], Δ x (t_{k}) = I_{k} (x (t_{k})), k = 1, \dots, m, x (0) = x (T) . \end{matrix}$ We first present a survey and then obtain new sufficient conditions for the existence of at least one solution by using Mawhin’s continuation theorem. Examples are presented to illustrate the main results.

A survey of certain trace inequalities

Dénes Petz (1994)

Banach Center Publications

This paper concerns inequalities like TrA ≤ TrB, where A and B are certain Hermitian complex matrices and Tr stands for the trace. In most cases A and B will be exponential or logarithmic expressions of some other matrices. Due to the interest of the author in quantum statistical mechanics, the possible applications of the trace inequalities will be commented from time to time. Several inequalities treated below have been established in the context of Hilbert space operators or operator algebras....

A survey of some recent inequalities for the norm and numerical radius of operators in Hilbert spaces.

Dragomir, Sever S. (2007)

Banach Journal of Mathematical Analysis [electronic only]

A survey of the spectral and differential geometric aspects of the generalized de Rham-Hodge theory related with Delsarte transmutation operators in multidimension and applications to spectral and soliton problems. I.

Prykarpatsky, Yarema A., Samoilenko, Anatoliy M., Prykarpatsky, Anatoliy K. (2005)

Applied Mathematics E-Notes [electronic only]

A survey of the spectral and differential geometric aspects of the generalized De Rham-Hodge theory related with Delsarte transmutation operators in multidimension and applications to spectral and soliton problems. II.

Prykarpatsky, Yarema A., Samoilenko, Anatoliy M., Prykarpatsky, Anatoliy K. (2006)

Applied Mathematics E-Notes [electronic only]

A symbolic calculus and a parametrix construction for pseudodifferential operators with non-smooth negative definite symbols.

Alexander Potrykus (2009)

Revista Matemática Complutense

A system of generalized mixed equilibrium problems and fixed point problems for pseudocontractive mappings in Hilbert spaces.

Kumam, Poom, Jaiboon, Chaichana (2010)

Fixed Point Theory and Applications [electronic only]

Currently displaying 761 – 780 of 11135

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Displaying 761 – 780 of 11135

A sufficient condition for the boundedness of operator-weighted martingale transforms and Hilbert transform

A sufficient condition for the Carasso-Kato theorem.

A sufficient condition for the Carasso-Kato theorem (Erratum).

A sufficient condition of type (...) for Tame Splitting of short exact sequences of Fréchet spaces.

A superquadratic method for solving variational inclusions under weak conditions.

A survey and some new results on the existence of solutions of IPBVPs for first order functional differential equations

A survey of certain trace inequalities

A survey of some recent inequalities for the norm and numerical radius of operators in Hilbert spaces.

A survey of the spectral and differential geometric aspects of the generalized de Rham-Hodge theory related with Delsarte transmutation operators in multidimension and applications to spectral and soliton problems. I.

A survey of the spectral and differential geometric aspects of the generalized De Rham-Hodge theory related with Delsarte transmutation operators in multidimension and applications to spectral and soliton problems. II.

A survey on dilations of projective isometric representations.

A survey on the numerical index of a Banach space.

A survey on the Weierstrass approximation theorem.

A symbolic calculus and a parametrix construction for pseudodifferential operators with non-smooth negative definite symbols.

A system of generalized mixed equilibrium problems and fixed point problems for pseudocontractive mappings in Hilbert spaces.

A system of nonlinear operator equations for a mixed family of fuzzy and crisp operators in probabilistic normed spaces.

A Szegö type property for two doubly commuting contractions

A tauberian theorem in quantum mechanical inverse scattering theory

A theorem of Borsuk-Ulam type for multifunctions

A theorem of Meir-Keeler type revisited.

Currently displaying 761 – 780 of 11135