Results 21 to 30 of about 10,899 (224)

A generalization of the Schauder fixed point theorem via multivalued contractions

open access: green, 2001
Summary: We establish a fixed point theorem for a continuous function \(f:X\to E\), where \(E\) is a Banach space and \(X\subseteq E\). Our result, which involves multivalued contractions, contains the classical Schauder fixed point theorem as a special case. An application is presented.
Paolo Cubiotti, Beatrice Di Bella
openalex   +4 more sources

On the Asymptotic Integration of Nonlinear Dynamic Equations

open access: yesAdvances in Difference Equations, 2008
The purpose of this paper is to study the existence and asymptotic behavior of solutions to a class of second-order nonlinear dynamic equations on unbounded time scales.
Toufik Moussaoui   +3 more
doaj   +2 more sources

Existence results for impulsive neutral functional differential equations with state-dependent delay [PDF]

open access: yes, 2009
In this article, we study the existence of mild solutions for a class of impulsive abstract partial neutral functional differential equations with state-dependent delay.
Arjunan, M.M., Kavitha, V.
core   +7 more sources

Schauder’s fixed-point theorem in approximate controllability problems [PDF]

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2016
Abstract The main objective of this article is to present the state of the art concerning approximate controllability of dynamic systems in infinite-dimensional spaces. The presented investigation focuses on obtaining sufficient conditions for approximate controllability of various types of dynamic systems using Schauder’s fixed-point ...
Babiarz, Artur   +2 more
openaire   +3 more sources

Recent Existence Results for Second-Order Singular Periodic Differential Equations

open access: yesBoundary Value Problems, 2009
We present some recent existence results for second-order singular periodic differential equations. A nonlinear alternative principle of Leray-Schauder type, a well-known fixed point theorem in cones, and Schauder's fixed point theorem are used in ...
Juan J. Nieto, Jifeng Chu
doaj   +2 more sources

Positive solutions for multi point impulsive boundary value problems on time scales [PDF]

open access: yes, 2019
In this paper, we consider nonlinear second-order multi-point impulsive boundary value problems on time scales. We establish the criteria for the existence of at least one, two and three positive solutions by using the Leray-Schauder fixed point theorem,
Yaslan, İsmail
core   +1 more source

Weak solutions to Allen-Cahn-like equations modelling consolidation of porous media [PDF]

open access: yes, 2016
We study the weak solvability of a system of coupled Allen--Cahn--like equations resembling cross--diffusion which is arising as a model for the consolidation of saturated porous media.
Cirillo, Emilio Nicola Maria   +2 more
core   +2 more sources

Poisson problems for semilinear Brinkman systems on Lipschitz domains in Rn [PDF]

open access: yes, 2015
The purpose of this paper is to combine a layer potential analysis with the Schauder fixed point theorem to show the existence of solutions of the Poisson problem for a semilinear Brinkman system on bounded Lipschitz domains in Rn (n 65 2) with ...
Kohr, Mirela   +2 more
core   +1 more source

A Schauder-type fixed point theorem

open access: yesJournal of Mathematical Analysis and Applications, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Burton, T. A., Zhang, Bo
openaire   +3 more sources

Nonlinear Fractional q-Difference Equation with Fractional Hadamard and Quantum Integral Nonlocal Conditions

open access: yesJournal of Function Spaces, 2020
In this paper, we establish existence and uniqueness results for a boundary value problem consisting by a nonlinear fractional q-difference equation subject to a new type of boundary condition, combining the fractional Hadamard and quantum integrals. Our
Athasit Wongcharoen   +3 more
doaj   +1 more source

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