Results 71 to 80 of about 11,694 (136)

A structural version of the theorem of Hahn-Banach [PDF]

open access: yes
We consider one of the basic results of functional analysis, the classical theorem of Hahn-Banach. This theorem gives the existence of a continuous linear functional on a given normed vectorspace extending a given continuous linear functional on a ...
Brinkhuis, J.
core   +1 more source

Failure of the trilinear operator space Grothendieck theorem

open access: yesDiscrete Analysis, 2019
Failure of the trilinear operator space Grothendieck theorem, Discrete Analysis 2019:8, 16 pp. Let $\beta:\ell_\infty^n\times \ell_\infty^n\to\mathbb C$ be a bilinear form.
Jop Briët, Carlos Palazuelos
doaj   +1 more source

Approximate controllability of Euler-Bernoulli viscoelastic systems

open access: yesElectronic Journal of Differential Equations, 2019
In this article, we study an Euler-Bernoulli viscoelastic control system which is dissipative due to the presence of the viscoelastic term. The main feature which distinguishes this paper from other related works lies in the fact that we no longer ...
Zhifeng Yang, Zhaosheng Feng
doaj  

Extension of bounded linear functionals and best approximation in spaces with asymmetric norm

open access: yesJournal of Numerical Analysis and Approximation Theory, 2004
The present paper is concerned with the characterization of the elements of best approximation in a subspace \(Y\) of a space with asymmetric norm, in terms of some linear functionals vanishing on \(Y\).
Ş. Cobzaş, C. Mustăţa
doaj   +2 more sources

Ultradifferentiable classes of entire functions. [PDF]

open access: yesAdv Oper Theory, 2023
Nenning DN, Schindl G.
europepmc   +1 more source

Best approximation in spaces with asymmetric norm

open access: yesJournal of Numerical Analysis and Approximation Theory, 2006
In this paper we shall present some results on spaces with asymmetric seminorms, with emphasis on best approximation problems in such spaces.
Ştefan Cobzaş, Costică Mustăţa
doaj   +2 more sources

Lipschitz Carnot-Carathéodory Structures and their Limits. [PDF]

open access: yesJ Dyn Control Syst, 2023
Antonelli G   +2 more
europepmc   +1 more source

Bishop-Phelps Theorem for Normed Cones

open access: yesپژوهش‌های ریاضی, 2019
Introduction In the last few years there is a growing interest in the theory of quasi-metric spaces and other related structures such as quasi-normed cones and asymmetric normed linear spaces, because such a theory provides an important tool in the study
Ildar Sadeghi, Ali Hassanzadeh
doaj  

From linear to metric functional analysis. [PDF]

open access: yesProc Natl Acad Sci U S A, 2021
Karlsson A.
europepmc   +1 more source

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