scholarly journals On the ultradifferentiable normalization

2021 ◽  
Author(s):  
Hao Wu ◽  
Xingdong Xu ◽  
Dongfeng Zhang
Keyword(s):  
Banach Space ◽  
Contraction Mapping ◽  
Contraction Mapping Principle ◽  
Weighted Norms

AbstractWe show the theory of the formal ultradifferentiable normalization. The tools utilized here are KAM methods and Contraction Mapping Principle in the Banach space fixed with weighted norms.

scholarly journals On uniformly contractive systems and quadratic equations in Banach space

1995 ◽  
Vol 52 (3) ◽  
pp. 441-455 ◽  
Author(s):  
David K. Ruch
Keyword(s):  
Banach Space ◽  
Systems Theory ◽  
Pointwise Convergence ◽  
Contraction Mapping ◽  
Continuation Method ◽  
Approximate Solutions ◽  
Contraction Mapping Principle ◽  
Uniqueness Result ◽  
Convergence Criteria ◽  
Quadratic Equations

The solution of quadratic equations using the contraction mapping principle is considered. A uniqueness result extending that given by Argyros is proved. Uniformly contractive systems theory is used to find approximate solutions and convergence criteria are given. In particular, only pointwise convergence of approximating operators is required to guarantee convergence of the approximate solutions. A theorem and algorithm for a continuation method are presented, and illustrated on Chandrasekhar's equation.

scholarly journals Weighted norms and Volterra integral equations in LP spaces

1991 ◽  
Vol 4 (2) ◽  
pp. 161-164 ◽  
Author(s):  
Jaroslaw Kwapisz
Keyword(s):  
Contraction Mapping ◽  
Continuous Functions ◽  
Contraction Mapping Principle ◽  
Weighted Norm ◽  
Uniqueness Of Solutions ◽  
Lp Spaces ◽  
Banach Contraction ◽  
Weighted Norms ◽  
Banach Contraction Mapping Principle ◽  
Banach Contraction Mapping

A new simple proof of existence and uniqueness of solutions of the Volterra integral equation in Lebesque spaces is given. It is shown that the weighted norm technique and the Banach contraction mapping principle can be applied (as in the case of continuous functions space).

scholarly journals Discrete fractional order two-point boundary value problem with some relevant physical applications

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
A. George Maria Selvam ◽  
Jehad Alzabut ◽  
R. Dhineshbabu ◽  
S. Rashid ◽  
M. Rehman
Keyword(s):  
Boundary Value Problem ◽  
Fractional Order ◽  
Contraction Mapping ◽  
Boundary Value ◽  
Contraction Mapping Principle ◽  
Difference Operators ◽  
Point Boundary ◽  
Uniqueness Of Solutions ◽  
Fractional Difference ◽  
Rassias Stability

Abstract The results reported in this paper are concerned with the existence and uniqueness of solutions of discrete fractional order two-point boundary value problem. The results are developed by employing the properties of Caputo and Riemann–Liouville fractional difference operators, the contraction mapping principle and the Brouwer fixed point theorem. Furthermore, the conditions for Hyers–Ulam stability and Hyers–Ulam–Rassias stability of the proposed discrete fractional boundary value problem are established. The applicability of the theoretical findings has been demonstrated with relevant practical examples. The analysis of the considered mathematical models is illustrated by figures and presented in tabular forms. The results are compared and the occurrence of overlapping/non-overlapping has been discussed.

scholarly journals Ulam-Hyers-Rassias stability for a class of nonlinear implicit Hadamard fractional integral boundary value problem with impulses

2021 ◽  
Vol 7 (2) ◽  
pp. 3169-3185
Author(s):  
Kaihong Zhao ◽  
◽  
Shuang Ma
Keyword(s):  
Contraction Mapping ◽  
Contraction Mapping Principle ◽  
Integral Boundary ◽  
Nonlinear Functional Analysis ◽  
Nonlinear Functional ◽  
Hadamard Fractional Differential Equations ◽  
Analysis Technique ◽  
Fractional Differential ◽  
Rassias Stability ◽  
Hadamard Fractional Integral

<abstract><p>This paper considers a class of nonlinear implicit Hadamard fractional differential equations with impulses. By using Banach's contraction mapping principle, we establish some sufficient criteria to ensure the existence and uniqueness of solution. Furthermore, the Ulam-Hyers stability and Ulam-Hyers-Rassias stability of this system are obtained by applying nonlinear functional analysis technique. As applications, an interesting example is provided to illustrate the effectiveness of main results.</p></abstract>

scholarly journals On singular systems of nonlinear equations involving 3n-Caputo derivatives

2020 ◽  
Vol 23 (2) ◽  
pp. 179-192
Author(s):  
Amele Taïeb
Keyword(s):  
Existence And Uniqueness ◽  
Contraction Mapping ◽  
Singular Systems ◽  
Nonlinear Differential Equations ◽  
Contraction Mapping Principle ◽  
Systems Of Nonlinear Equations ◽  
Fractional Systems ◽  
Caputo Derivatives ◽  
Existence And Uniqueness Results ◽  
Uniqueness Results

We study singular fractional systems of nonlinear differential equations involving 3n-Caputo derivatives. We investigate existence and uniqueness results using the contraction mapping principle. We also discuss the existence of at least one solution by means of Schauder fixed point theorem. Moreover, we define and discuss the Ulam–Hyers stability and the generalized Ulam–Hyers stability of solutions for such systems. To illustrate the main results, we present some examples.

scholarly journals Exponential Stability of Periodic Solution to Wilson-Cowan Networks with Time-Varying Delays on Time Scales

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Jinxiang Cai ◽  
Zhenkun Huang ◽  
Honghua Bin
Keyword(s):  
Periodic Solution ◽  
Stability Analysis ◽  
Exponential Stability ◽  
Time Scales ◽  
Continuous Time ◽  
Lyapunov Functional ◽  
Contraction Mapping ◽  
Sufficient Conditions ◽  
Contraction Mapping Principle ◽  
Time Varying

We present stability analysis of delayed Wilson-Cowan networks on time scales. By applying the theory of calculus on time scales, the contraction mapping principle, and Lyapunov functional, new sufficient conditions are obtained to ensure the existence and exponential stability of periodic solution to the considered system. The obtained results are general and can be applied to discrete-time or continuous-time Wilson-Cowan networks.

scholarly journals Asymptotic Behavior of Solutions to the Damped Nonlinear Hyperbolic Equation

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Yu-Zhu Wang
Keyword(s):  
Cauchy Problem ◽  
Asymptotic Behavior ◽  
Hyperbolic Equation ◽  
Contraction Mapping ◽  
Dimensional Space ◽  
Contraction Mapping Principle ◽  
Nonlinear Hyperbolic Equation ◽  
Asymptotic Behavior Of Solutions ◽  
Initial Value ◽  
The Cauchy Problem

We consider the Cauchy problem for the damped nonlinear hyperbolic equation inn-dimensional space. Under small condition on the initial value, the global existence and asymptotic behavior of the solution in the corresponding Sobolev spaces are obtained by the contraction mapping principle.

Evaluation of the Forward-Backward Sweep Load Flow Method using the Contraction Mapping Principle

2016 ◽  
Vol 6 (6) ◽  
pp. 3229
Author(s):  
Diego Issicaba ◽  
Jorge Coelho
Keyword(s):  
Distribution System ◽  
Existence And Uniqueness ◽  
Contraction Mapping ◽  
System Analysis ◽  
Feasible Solution ◽  
Contraction Mapping Principle ◽  
Load Flow ◽  
Contraction Mapping Theorem ◽  
Flow Method ◽  
Theoretical Results

<p>This paper presents an assessment of the forward-backward sweep load flow method to distribution system analysis. The method is formally assessed using fixed-point concepts and the contraction mapping theorem. The existence and uniqueness of the load flow feasible solution is supported by an alternative argument from those obtained in the literature. Also, the closed-form of the convergence rate of the method is deduced and the convergence dependence of loading is assessed. Finally, boundaries for error values per iteration between iterates and feasible solution are obtained. Theoretical results have been tested in several numerical simulations, some of them presented in this paper, thus fostering discussions about applications and future works.</p>

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