Results 31 to 40 of about 601 (93)

A note on complementarity problem

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 21, Issue 3, Page 621-623, 1998., 1998
In this paper we prove a result of complementarity problem where compact condition is somewhat relaxed.
Antonio Carbone
wiley   +1 more source

Topological Transversality Principles and General Coincidence Theory

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
This paper presents general topological coincidence principles for multivalued maps defined on subsets of completely regular topological spaces.
O’Regan Donal
doaj   +1 more source

Eigenvalues and ranges for perturbations of nonlinear accretive and monotone operators in Banach spaces

open access: yesAbstract and Applied Analysis, Volume 2, Issue 3-4, Page 197-205, 1997., 1997
Various eigenvalue and range results are given for perturbations of m‐accretive and maximal monotone operators. The eigenvalue results improve and extend some recent results by Guan and Kartsatos, while the range theorem gives an affirmative answer to a recent problem of Kartsatos.
Zhou Haiyun, Athanassios G. Kartsatos
wiley   +1 more source

A new class of unsaturated mappings: Ćirić-Reich-Rus contractions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2022
Using the technique of enriching contractive type mappings, we introduce a more general concept of enriched Ćirić-Reich-Rus contraction than the one studied in [Berinde, V.; Păcurar, M.
Berinde Vasile, Păcurar Mădălina
doaj   +1 more source

An extension of a best approximation theorem

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 19, Issue 4, Page 711-716, 1996., 1995
In this paper an extension of a theorem of Prolla is given and several interesting corollaries are derived. Fixed point results are also given in the end.
A. Carbone
wiley   +1 more source

Abstract Leray–Schauder Type Alternatives and Extensions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
We present a Leray–Schauder type alternative for a general class of maps. This enables us to obtain some Birkhoff–Kellogg type results and a Furi–Pera result.
O’Regan Donal
doaj   +1 more source

Generalized functional inequalities in Banach spaces

open access: yesMoroccan Journal of Pure and Applied Analysis, 2021
In this paper, we solve and investigate the generalized additive functional inequalities ‖F(∑i=1nxi)-∑i=1nF(xi)‖≤‖F(1n∑i=1nxi)-1n∑i=1nF(xi)‖\left\| {F\left( {\sum\limits_{i = 1}^n {{x_i}} } \right) - \sum\limits_{i = 1}^n {F\left( {{x_i}} \right ...
Dimou H., Aribou Y., Kabbaj S.
doaj   +1 more source

The best approximation and an extension of a fixed point theorem of F. E. Browder

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 18, Issue 4, Page 745-748, 1995., 1994
In this paper, the KKM principle has been used to obtain a theorem on the best approximation of a continuous function with respect to an affine map. The main result provides extensions of some well‐known fixed point theorems.
V. M. Sehgal, S. P. Singh
wiley   +1 more source

Leray–Schauder Alternatives for Maps Satisfying Countable Compactness Conditions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
In this paper we present Leray–Schauder alternatives for a general class of Mönch type maps.
O’Regan Donal
doaj   +1 more source

Some results on invariant approximation

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 17, Issue 3, Page 483-487, 1994., 1993
In this paper results on Invariant approximations, extending and unifying earlier results are given. Several interesting results are derived as corollaries.
Antonio Carbone
wiley   +1 more source

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