scholarly journals A Newton-type method and its application

2006 ◽  
Vol 2006 ◽  
pp. 1-9 ◽  
Author(s):  
V. Antony Vijesh ◽  
P. V. Subrahmanyam
Keyword(s):  
Existence And Uniqueness ◽  
Functional Integral ◽  
Existence And Uniqueness Theorem ◽  
Open Convex ◽  
Type Method ◽  
Nonlinear Functional ◽  
Recent Theorem ◽  
Urysohn Operator ◽  
Functional Integral Equations ◽  
Open Convex Subset

We prove an existence and uniqueness theorem for solving the operator equationF(x)+G(x)=0, whereFis a continuous and Gâteaux differentiable operator and the operatorGsatisfies Lipschitz condition on an open convex subset of a Banach space. As corollaries, a recent theorem of Argyros (2003) and the classical convergence theorem for modified Newton iterates are deduced. We further obtain an existence theorem for a class of nonlinear functional integral equations involving the Urysohn operator.

On a generalized coupled fixed point theorem in C[0, 1] and its application to a class of coupled systems of functional-integral equations

2015 ◽  
Vol 31 (3) ◽  
pp. 333-337
Author(s):  
J. HARJANI ◽  
◽  
J. ROCHA ◽  
K. SADARANGANI ◽  
◽  
...  
Keyword(s):  
Fixed Point ◽  
Integral Equations ◽  
Existence And Uniqueness ◽  
Coupled Fixed Point ◽  
General System ◽  
Functional Integral ◽  
Coupled Systems ◽  
Nonlinear Functional ◽  
Coupled Fixed Point Theorem ◽  
Functional Integral Equations

In this paper, we present a result about the existence of a generalized coupled fixed point in the space C[0, 1]. Moreover, as an application of the result, we study the problem of existence and uniqueness of solution in C[0, 1] for a general system of nonlinear functional-integral equations with maximum.

scholarly journals On generalized Newton method for solving operator inclusions

Filomat ◽  
2012 ◽  
Vol 26 (5) ◽  
pp. 1055-1063 ◽  
Author(s):  
D.R. Sahu ◽  
Kumar Singh
Keyword(s):  
Newton Method ◽  
Existence And Uniqueness ◽  
Maximal Monotone ◽  
Generalized Newton Method ◽  
Existence And Uniqueness Theorem ◽  
Open Convex ◽  
Math Programming ◽  
Generalized Operator ◽  
Generalized Newton ◽  
Open Convex Subset

In this paper, we study the existence and uniqueness theorem for solving the generalized operator equation of the form F(x) + G(x) + T(x) ? 0, where F is a Fr?chet differentiable operator, G is a maximal monotone operator and T is a Lipschitzian operator defined on an open convex subset of a Hilbert space. Our results are improvements upon corresponding results of Uko [Generalized equations and the generalized Newton method, Math. Programming 73 (1996) 251-268].

scholarly journals Generalizations of Darbo’s fixed point theorem for new condensing operators with application to a functional integral equation

2019 ◽  
Vol 52 (1) ◽  
pp. 166-182 ◽  
Author(s):  
Habib ur Rehman ◽  
Dhananjay Gopal ◽  
Poom Kumam
Keyword(s):  
Fixed Point ◽  
Fixed Point Theorem ◽  
Point Theorem ◽  
Fixed Point Theorems ◽  
Coupled Fixed Point ◽  
Functional Integral ◽  
Nonlinear Functional ◽  
Darbo’S Fixed Point Theorem ◽  
Condensing Operators ◽  
Functional Integral Equations

AbstractIn this paper, we provide some generalizations of the Darbo’s fixed point theorem associated with the measure of noncompactness and present some results on the existence of the coupled fixed point theorems for a special class of operators in a Banach space. To acquire this result, we defineα-ψandβ-ψcondensing operators and using them we propose new fixed point results. Our results generalize and extend some comparable results from the literature. Additionally, as an application, we apply the obtained fixed point theorems to study the nonlinear functional integral equations.

scholarly journals The Technique of Measures of Noncompactness in Banach Algebras and Its Applications to Integral Equations

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Józef Banaś ◽  
Szymon Dudek
Keyword(s):  
Banach Algebra ◽  
Integral Equations ◽  
Banach Algebras ◽  
Functional Integral ◽  
Existence Results ◽  
Measures Of Noncompactness ◽  
Nonlinear Functional ◽  
Half Axis ◽  
Functional Integral Equations

We study the solvability of some nonlinear functional integral equations in the Banach algebra of real functions defined, continuous, and bounded on the real half axis. We apply the technique of measures of noncompactness in order to obtain existence results for equations in question. Additionally, that technique allows us to obtain some characterization of considered integral equations. An example illustrating the obtained results is also included.

scholarly journals On existence of extremal solutions of nonlinear functional integral equations in Banach algebras

2004 ◽  
Vol 2004 (3) ◽  
pp. 271-282 ◽  
Author(s):  
B. C. Dhage
Keyword(s):  
Fixed Point ◽  
Integral Equations ◽  
Banach Algebras ◽  
Functional Integral ◽  
Nonlinear Integral Equations ◽  
Simple Method ◽  
Nonlinear Functional ◽  
Equations Of Mixed Type ◽  
Special Cases ◽  
Functional Integral Equations

An algebraic fixed point theorem involving the three operators in a Banach algebra is proved using the properties of cones and they are further applied to a certain nonlinear integral equations of mixed type x(t)=k(t,x(μ(t)))+[f(t,x(θ(t)))](q(t)+∫0σ(t)v(t,s)g(s,x(η(s)))ds) for proving the existence of maximal and minimal solutions. Our results include the earlier fixed point theorems of Dhage (1992 and 1999) as special cases with a different but simple method.

scholarly journals A Problem Concerning Yamabe-Type Operators of Negative Admissible Metrics

2012 ◽  
Vol 2012 ◽  
pp. 1-11
Author(s):  
Jin Liang ◽  
Huan Zhu
Keyword(s):  
Functional Analysis ◽  
Maximum Principle ◽  
Uniqueness Theorem ◽  
Existence And Uniqueness ◽  
Degree Theory ◽  
Yamabe Problem ◽  
Existence And Uniqueness Theorem ◽  
Nonlinear Functional Analysis ◽  
Nonlinear Functional ◽  
The Maximum Principle

This paper is about a problem concerning nonlinear Yamabe-type operators of negative admissible metrics. We first give a result onσkYamabe problem of negative admissible metrics by virtue of the degree theory in nonlinear functional analysis and the maximum principle and then establish an existence and uniqueness theorem for the solutions to the problem.

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