Results 21 to 30 of about 16,156 (266)

Optimality Conditions for ε-Vector Equilibrium Problems

open access: yesAbstract and Applied Analysis, 2014
By virtue of the separation theorem of convex sets, a necessary condition and a sufficient condition for ε-vector equilibrium problem with constraints are obtained. Then, by using the Gerstewitz nonconvex separation functional, a necessary and sufficient
Lu Wei-zhong, Huang Shou-jun, Yang Jun
doaj   +1 more source

Trakhtenbrot's Theorem in Coq: Finite Model Theory through the Constructive Lens [PDF]

open access: yesLogical Methods in Computer Science, 2022
We study finite first-order satisfiability (FSAT) in the constructive setting of dependent type theory. Employing synthetic accounts of enumerability and decidability, we give a full classification of FSAT depending on the first-order signature of non ...
Dominik Kirst   +1 more
doaj   +1 more source

On complex L1-predual spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1987
This paper contains some characterisations of complex L-balls, including interpolation theorems which are analogs of Edward's separation theorem for simplices.
Mrinal Kanti Das
doaj   +1 more source

Complex oscillations of non-definite Sturm-Liouville problems, II

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
We correct and update a result of R. G. D. Richardson [Amer. J. Math. 40(1918), 283–316] dealing with the separation of zeros of the real and imaginary parts of non-real eigenfunctions of non-definite Sturm–Liouville eigenvalue problems.
Angelo Mingarelli
doaj   +1 more source

Covering and separation for logical fragments with modular predicates [PDF]

open access: yesLogical Methods in Computer Science, 2019
For every class $\mathscr{C}$ of word languages, one may associate a decision problem called $\mathscr{C}$-separation. Given two regular languages, it asks whether there exists a third language in $\mathscr{C}$ containing the first language, while being ...
Thomas Place   +2 more
doaj   +1 more source

Asymmetric locally convex spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
The aim of the present paper is to introduce the asymmetric locally convex spaces and to prove some basic properties. Among these I do mention the analogs of the Eidelheit-Tuckey separation theorems, of the Alaoglu-Bourbaki theorem on the weak ...
S. Cobzaş
doaj   +1 more source

Computably regular topological spaces [PDF]

open access: yesLogical Methods in Computer Science, 2013
This article continues the study of computable elementary topology started by the author and T. Grubba in 2009 and extends the author's 2010 study of axioms of computable separation.
Klaus Weihrauch
doaj   +1 more source

Products on Maximal Compact Frames

open access: yesRatio Mathematica, 2023
In topological spaces, many topological properties such as separation properties, paracompactness etc. are preserved under the act of taking product of topological spaces.
Jayaprasad P. N.
doaj   +1 more source

Separation and the existence theorem for second order nonlinear differential equation

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
Sufficient conditions for the invertibility and separability in $L_2(-\infty, +\infty)$ of the degenerate second order differential operator with complex-valued coefficients are obtained, and its applications to the spectral and approximate problems are ...
Kordan Ospanov, Raya Akhmetkaliyeva
doaj   +1 more source

Approximate Benson efficient solutions for set-valued equilibrium problems

open access: yesJournal of Inequalities and Applications, 2020
In locally convex Hausdorff topological vector spaces, the approximate Benson efficient solution is proposed for set-valued equilibrium problems and its relationship to the Benson efficient solution is discussed.
Shasha Hu, Yihong Xu, Zhichao Niu
doaj   +1 more source

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