solutions of nonlinear differential equations existence results via the variational approach trends in abstract and applied analysis

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Solutions Of Nonlinear Differential Equations

Author : Lin Li
ISBN : 9789813108622
Genre : Mathematics
File Size : 23. 34 MB
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Variational methods are very powerful techniques in nonlinear analysis and are extensively used in many disciplines of pure and applied mathematics (including ordinary and partial differential equations, mathematical physics, gauge theory, and geometrical analysis). In our first chapter, we gather the basic notions and fundamental theorems that will be applied throughout the chapters. While many of these items are easily available in the literature, we gather them here both for the convenience of the reader and for the purpose of making this volume somewhat self-contained. Subsequent chapters deal with how variational methods can be used in fourth-order problems, Kirchhoff problems, nonlinear field problems, gradient systems, and variable exponent problems. A very extensive bibliography is also included. Contents:PrefaceSome Notations and ConventionsPreliminaries and Variational PrinciplesQuasilinear Fourth-Order ProblemsKirchhoff ProblemsNonlinear Field ProblemsGradient SystemsVariable Exponent Problems Readership: Graduate students and researchers interested in variational methods.

Solutions Of Nonlinear Differential Equations

Author : Lin Li
ISBN : 9813108606
Genre : Differential equations, Nonlinear
File Size : 89. 24 MB
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Variational methods are very powerful techniques in nonlinear analysis and are extensively used in many disciplines of pure and applied mathematics (including ordinary and partial differential equations, mathematical physics, gauge theory, and geometrical analysis). In our first chapter, we gather the basic notions and fundamental theorems that will be applied throughout the chapters. While many of these items are easily available in the literature, we gather them here both for the convenience of the reader and for the purpose of making this volume somewhat self-contained. Subsequent chapters deal with how variational methods can be used in fourth-order problems, Kirchhoff problems, nonlinear field problems, gradient systems, and variable exponent problems. A very extensive bibliography is also included.

Ordinary Differential Equations And Boundary Value Problems

Author : John R Graef
ISBN : 9789813236479
Genre :
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The authors give a treatment of the theory of ordinary differential equations (ODEs) that is excellent for a first course at the graduate level as well as for individual study. The reader will find it to be a captivating introduction with a number of non-routine exercises dispersed throughout the book. The authors begin with a study of initial value problems for systems of differential equations including the Picard and Peano existence theorems. The continuability of solutions, their continuous dependence on initial conditions, and their continuous dependence with respect to parameters are presented in detail. This is followed by a discussion of the differentiability of solutions with respect to initial conditions and with respect to parameters. Comparison results and differential inequalities are included as well. Linear systems of differential equations are treated in detail as is appropriate for a study of ODEs at this level. Just the right amount of basic properties of matrices are introduced to facilitate the observation of matrix systems and especially those with constant coefficients. Floquet theory for linear periodic systems is presented and used to analyze nonhomogeneous linear systems. Stability theory of first order and vector linear systems are considered. The relationships between stability of solutions, uniform stability, asymptotic stability, uniformly asymptotic stability, and strong stability are examined and illustrated with examples as is the stability of vector linear systems. The book concludes with a chapter on perturbed systems of ODEs. Contents: Systems of Differential Equations Continuation of Solutions and Maximal Intervals of Existence Smooth Dependence on Initial Conditions and Smooth Dependence on a Parameter Some Comparison Theorems and Differential Inequalities Linear Systems of Differential Equations Periodic Linear Systems and Floquet Theory Stability Theory Perturbed Systems and More on Existence of Periodic Solutions Readership: Graduate students and researchers interested in ordinary differential equations. Keywords: Differential Equations;Linear Systems;Comparison Theorems;Differential Inequalities;Periodic Systems;Floquet Theory;Stability Theory;Perturbed Equations;Periodic SolutionsReview: Key Features: Clarity of presentation Treatment of linear and nonlinear problems Introduction to stability theory Nonroutine exercises to expand insight into more difficult concepts Examples provided with thorough explanations

Ordinary Differential Equations And Boundary Value Problems Volume Ii Boundary Value Problems

Author : Graef John R
ISBN : 9789813274044
Genre : Mathematics
File Size : 80. 55 MB
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The authors give a systematic introduction to boundary value problems (BVPs) for ordinary differential equations. The book is a graduate level text and good to use for individual study. With the relaxed style of writing, the reader will find it to be an enticing invitation to join this important area of mathematical research. Starting with the basics of boundary value problems for ordinary differential equations, linear equations and the construction of Green's functions are presented clearly.A discussion of the important question of the existence of solutions to both linear and nonlinear problems plays a central role in this volume and this includes solution matching and the comparison of eigenvalues.The important and very active research area on existence and multiplicity of positive solutions is treated in detail. The last chapter is devoted to nodal solutions for BVPs with separated boundary conditions as well as for non-local problems.While this Volume II complements , it can be used as a stand-alone work.

Higher Order Boundary Value Problems On Unbounded Domains Types Of Solutions Functional Problems And Applications

Author : Minhos Feliz Manuel
ISBN : 9789813220072
Genre : Mathematics
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This volume provides a comprehensive overview on different types of higher order boundary value problems defined on the half-line or on the real line (Sturm–Liouville and Lidstone types, impulsive, functional and problems defined by Hammerstein integral equations). It also includes classical and new methods and techniques to deal with the lack of compactness of the related operators. The reader will find a selection of original and recent results in this field, conditions to obtain solutions with particular qualitative properties, such as homoclinic and heteroclinic solutions and its relation with the solutions of Lidstone problems on all the real line. Each chapter contains applications to real phenomena, to classical equations or problems, with a common denominator: they are defined on unbounded intervals and the existing results in the literature are scarce or proven only numerically in discrete cases. The last part features some higher order functional problems, which generalize the classical two-point or multi-point boundary conditions, to more comprehensive data where an overall behavior of the unknown functions and their derivatives is involved. Contents: Boundary Value Problems on the Half-Line: Third-Order Boundary Value ProblemsGeneral nth-Order ProblemsImpulsive Problems on the Half-Line with Infinite Impulse MomentsHomoclinic Solutions and Lidstone Problems: Homoclinic Solutions for Second-Order ProblemsHomoclinic Solutions to Fourth-Order ProblemsLidstone Boundary Value ProblemsHeteroclinic Solutions and Hammerstein Equations: Heteroclinic Solutions for Semi-Linear Problems (i)Heteroclinic Solutions for Semi-Linear Problems (ii)Heteroclinic Solutions for Semi-Linear Problems (iii)Hammerstein Integral Equations with Sign-Changing KernelsFunctional Boundary Value Problems: Second-Order Functional ProblemsThird-Order Functional Problemsϕ-Laplacian Equations with Functional Boundary Conditions Readership: Graduate students and researchers interested in nonlinear analysis. Keywords: Boundary Value Problems in Unbounded Domains;Impulsive Problems with Infinite Impulses;Homoclinic Solutions;Lidstone Problems on the Real Line;Heteroclinic Solutions for Hammerstein Equations;Functional ProblemsReview: Key Features: Presents higher order boundary value and impulsive problems on unbounded domainsElucidates homoclinic and heteroclinic solutions without growth, sign or periodicity assumptions on the nonlinearity, and their relation with Lidstone problems and Hammerstein equations on the real lineExplains clearly the semi-linear and higher order functional problems where the boundary conditions can include nonlocal data and global variation on the unknown functions, such as multi-point, integral, maximum and/or minimum arguments

The Strong Nonlinear Limit Point Limit Circle Problem

Author : Graef John R
ISBN : 9789813226395
Genre : Mathematics
File Size : 43. 60 MB
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The limit-point/limit-circle problem had its beginnings more than 100 years ago with the publication of Hermann Weyl's classic paper in Mathematische Annalen in 1910 on linear differential equations. This concept was extended to second-order nonlinear equations in the late 1970's and later, to higher order nonlinear equations. This monograph traces the development of what is known as the strong nonlinear limit-point and limit-circle properties of solutions. In addition to bringing together all such results into one place, some new directions that the study has taken as well as some open problems for future research are indicated. Contents: The Origins of the Limit-Point/Limit-Circle ProblemEquations with p-LaplacianStrong Limit-Point/Limit-Circle PropertiesDamped EquationsHigher Order EquationsDelay Equations IDelay Equations IITransformations of the Basic EquationNotes, Open Problems, and Future Directions Readership: Graduate students and researchers of mathematics integrated in limit-point/limit circle topics. Keywords: Limit-Point Problem;Limit-Circle Problem;Strong Limit-Point Problem;Strong Limit-Circle Problem;Asymptotic Properties of Solutions;Nonlinear Differential Equations;Second Order Equations;Higher Order EquationsReview: Key Features: There is no other source of results on this problem except for the individual papers that appear in the literature. This work collects all that is known about this problem in one placeThe references on the nonlinear problem are complete up to 2017Directions for future research are indicated

Differential And Difference Equations With Applications

Author : Sandra Pinelas
ISBN : 9783319756479
Genre : Mathematics
File Size : 50. 1 MB
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This book gathers papers from the International Conference on Differential & Difference Equations and Applications 2017 (ICDDEA 2017), held in Lisbon, Portugal on June 5-9, 2017. The editors have compiled the strongest research presented at the conference, providing readers with valuable insights into new trends in the field, as well as applications and high-level survey results. The goal of the ICDDEA was to promote fruitful collaborations between researchers in the fields of differential and difference equations. All areas of differential and difference equations are represented, with a special emphasis on applications.

Multiple Solutions Of Boundary Value Problems

Author : John R Graef
ISBN : 9789814696562
Genre : Mathematics
File Size : 56. 2 MB
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Variational methods and their generalizations have been verified to be useful tools in proving the existence of solutions to a variety of boundary value problems for ordinary, impulsive, and partial differential equations as well as for difference equations. In this monograph, we look at how variational methods can be used in all these settings. In our first chapter, we gather the basic notions and fundamental theorems that will be applied in the remainder of this monograph. While many of these items are easily available in the literature, we gather them here both for the convenience of the reader and for the purpose of making this volume somewhat self-contained. Subsequent chapters deal with the Sturm–Liouville problems, multi-point boundary value problems, problems with impulses, partial differential equations, and difference equations. An extensive bibliography is also included. Contents:Mathematical PreliminariesSturm–Liouville ProblemsMulti-Point ProblemsImpulsive ProblemsPartial Differential EquationsDifference Equations Readership: Graduate students and researchers interested in applying variational methods to a variety of boundary value problems. Key Features:Currently, no other book focuses on applying variational methods to solving various types of boundary value problemsThe basic tools needed to explore these kinds of problems are gathered into one placeIncludes an extensive bibliographyKeywords:Multi-point Boundary Value Problems;Variational Methods;Critical Point Theory;Impulsive Problems;Ordinary Differential Equations;Difference Equations;Partial Differential Equations;Sturm–Liouville Problems;Periodic Solutions

Theory And Applications Of Fractional Differential Equations

Author : A.A. Kilbas
ISBN : 0444518320
Genre : Mathematics
File Size : 66. 71 MB
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This work aims to present, in a systematic manner, results including the existence and uniqueness of solutions for the Cauchy Type and Cauchy problems involving nonlinear ordinary fractional differential equations.

Recent Trends In Differential Equations

Author : R P Agarwal
ISBN : 9789814505628
Genre : Mathematics
File Size : 66. 25 MB
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This series aims at reporting new developments of a high mathematical standard and of current interest. Each volume in the series shall be devoted to mathematical analysis that has been applied, or potentially applicable to the solutions of scientific, engineering, and social problems. The first volume of WSSIAA contains 42 research articles on differential equations by leading mathematicians from all over the world. This volume has been dedicated to V Lakshmikantham on his 65th birthday for his significant contributions in the field of differential equations. Contents:Semilinear and Quasilinear Stochastic Differential Equations in Banach Spaces (N U Ahmed)Asymptotic Behaviour of the Nonoscillating Solutions of First Order Linear Nonautonomous Neutral Equations (D Bainov & V Petrov)Boundary and Angular Layer Behavior in Singularly Perturbed Quasilinear Systems (K W Chang & G X Liu)Singular Perturbation for a System of Differential-Difference Equations (S-N Chow & W Huang)Bounds for Solutions Sets of Multivalued ODES (K Deimling)Comparison of Eigenvalues for a Class of Multipoint Boundary Value Problems (P W Eloe & J Henderson)A Solution to the General Bessel Moment Problem (W D Evans et al.)Boundedness in Linear Functional Differential Equations with Infinite Delay (J Kato)Foundation of Invariant Manifold Theory for Ordinary Differential Equations (H W Knobloch)and other papers Readership: Mathematicians and engineers. keywords:Differential Equations

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