Results 11 to 20 of about 513,254 (163)

The Hahn-Banach Extension Theorem for Fuzzy Normed Spaces Revisited [PDF]

open access: yesAbstract and Applied Analysis, 2014
This paper deals with fuzzy normed spaces in the sense of Cheng and Mordeson. We characterize fuzzy norms in terms of ascending and separating families of seminorms and prove an extension theorem for continuous linear functionals on a fuzzy normed space.
Carmen Alegre, Salvador Romaguera
doaj   +2 more sources

Hahn-Banach Theorem in Vector Spaces

open access: yesJournal of Mathematical Extension, 2010
. In this paper we introduce a new extension to Hahn-Banach Theorem and consider its relation with the linear operatres.
M. R. Haddad, H. Mazaheri
doaj   +1 more source

Note on the Hahn-Banach Theorem in a Partially Ordered Vector Space [PDF]

open access: yesJournal of Applied Mathematics, 2013
Using a fixed point theorem in a partially ordered set, we give a new proof of the Hahn-Banach theorem in the case where the range space is a partially ordered vector space.
Toshiharu Kawasaki   +2 more
doaj   +2 more sources

Convex programming based on Hahn Banach theorem [PDF]

open access: yes, 2022
The main objective of this chapter is to present the separation theorems, important consequences of Hahn-Theorem theorem. Therefore, we begin with an overview on convex sets and convex functionals.
Ferreira, M. A. M.
core   +2 more sources

The Hahn–Banach theorem almost everywhere [PDF]

open access: yes, 2015
The aim of this work is to present an almost everywhere version of the Hahn– Banach extension ...
Badora, Roman, Roman Badora
core   +1 more source

Existence Results for Fractional Hahn Difference and Fractional Hahn Integral Boundary Value Problems

open access: yesDiscrete Dynamics in Nature and Society, 2017
The existence and uniqueness results of two fractional Hahn difference boundary value problems are studied. The first problem is a Riemann-Liouville fractional Hahn difference boundary value problem for fractional Hahn integrodifference equations.
Nichaphat Patanarapeelert   +1 more
doaj   +1 more source

Nonlocal boundary value problems for second-order nonlinear Hahn integro-difference equations with integral boundary conditions

open access: yesAdvances in Difference Equations, 2017
In this paper, we study a boundary value problem for second-order nonlinear Hahn integro-difference equations with nonlocal integral boundary conditions. Our problem contains two Hahn difference operators and a Hahn integral. The existence and uniqueness
Umaphon Sriphanomwan   +4 more
doaj   +1 more source

A characterization of random approximations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1999
By using Hahn-Banach theorem, a characterization of random approximations is obtained.
Ismat Beg
doaj   +1 more source

An Analogy of Hahn-Banach Separation Theorem [PDF]

open access: yes, 2021
In this paper, we introduce the notion of nearly topological linear spaces and use it to formulate an alternative definition of the Hahn–Banach separation theorem. We also give an example of a topological linear space to which the result is not valid. It
Ram, M.
core   +1 more source

Markov Moment Problem and Sandwich Conditions on Bounded Linear Operators in Terms of Quadratic Forms

open access: yesMathematics, 2022
As is well-known, unlike the one-dimensional case, there exist nonnegative polynomials in several real variables that are not sums of squares. First, we briefly review a method of approximating any real-valued nonnegative continuous compactly supported ...
Octav Olteanu
doaj   +1 more source

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