Results 21 to 30 of about 50,138 (297)

Topological properties and matrix transformations of certain ordered generalized sequence spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
In this note, we carry out investigations related to the mixed impact of ordering and topological structure of a locally convex solid Riesz space (X,τ) and a scalar valued sequence space λ, on the vector valued sequence space λ(X) which is formed and ...
Manjul Gupta, Kalika Kaushal
doaj   +1 more source

Topological aspects in vector optimization problems

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Modelûvannâ, 2009
In this paper, we study vector optimization problems in partially ordered Banach spaces. We suppose that an objective mapping possesses a weakened property of lower semicontinuity and make no assumptions on the interior of the ordering cone.
P. I. Kogut, R. Manzo, I. V. Nechay
doaj   +1 more source

On Archimedean ordered vector spaces and a characterization of simplices [PDF]

open access: yesProceedings of the American Mathematical Society, 1992
We show that a convex subset K K of a linear space is a simplex if and only if it is line compact and every nonempty ...
Gierz, Gerhard, Shekhtman, Boris
openaire   +2 more sources

Infinitary properties of valued and ordered vector spaces [PDF]

open access: yesJournal of Symbolic Logic, 1999
§1. Introduction.The motivation of this work comes from two different directions: infinite abelian groups, and ordered algebraic structures. A challenging problem in both cases is that of classification. In the first case, it is known for example (cf.
openaire   +2 more sources

STATISTICALLY ?-BOUNDED OPERATORS ON ORDERED TOPOLOGICAL VECTOR SPACES

open access: yes, 2022
In this paper, we introduce statistical bounded sets on topological vector space. Also, we give the three notions of bounded operators from topological vector spaces to ordered topological vector spaces.
Aydin, Abdullah, Cinar, Muhammed
core   +1 more source

Remarks on the Paper ``Coupled Fixed Point Theorems for Single-Valued Operators in b-Metric Spaces'' [PDF]

open access: yesMathematics Interdisciplinary Research, 2017
In this paper, we improve some recent coupled fixed point results for single-valued operators in the framework of ordered b-metric spaces established by Bota et al. [M-F. Bota, A. Petrusel, G. Petrusel and B.
Zoran Kadelburg   +2 more
doaj   +1 more source

Helical spin dynamics in commensurate magnets: A study on brochantite, Cu_{4}SO_{4}(OH)_{6}

open access: yesPhysical Review Research, 2023
We report the direct observation of a commensurate-ordered antiferromagnetic (AFM) state but incommensurate helical spin dynamics in the natural mineral brochantite Cu_{4}SO_{4}(OH)_{6} through neutron diffraction and neutron spectroscopy measurements ...
S. E. Nikitin   +10 more
doaj   +1 more source

Subdifferential calculus for invariant linear ordered vector space-valued operators and applications [PDF]

open access: yes, 2016
We give a direct proof of sandwich-type theorems for linear invariant partially ordered vector space operators in the setting of convexity. As consequences, we deduce equivalence results between sandwich, Hahn-Banach, separation and Krein-type extension ...
Boccuto, Antonio
core   +1 more source

Vector Equilibrium Problems—A Unified Approach and Applications

open access: yesMathematics
We present existing results and properties for the solutions of some vector equilibrium problems with set-valued functions in the case of a vector space ordered by a cone with some “interiority” properties.
Cristina Stamate
doaj   +1 more source

PREŠIĆ TYPE OPERATORS ON ORDERED VECTOR METRIC SPACES

open access: yes, 2021
In this paper we present a fixed point theorem for order preserving Presic type operators on ordered vector metric spaces. This result extends many results in the literature obtained for Presic type operators both on metric spaces and partially ordered ...
Özeken, Çetin Cemal, Çevik, Cüneyt
core   +1 more source

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