Singular Differential and Integral Equations with Applications

ISBN-13: 9789048163564 / Angielski / Miękka / 2010 / 402 str.

R. P. Agarwal; Donal O'Regan

Opis

In the last century many problems which arose in the science, engineer ing and technology literature involved nonlinear complex phenomena. In many situations these natural phenomena give rise to (i). ordinary differ ential equations which are singular in the independent and/or dependent variables together with initial and boundary conditions, and (ii). Volterra and Fredholm type integral equations. As one might expect general exis tence results were difficult to establish for the problems which arose. Indeed until the early 1990's only very special examples were examined and these examples were usually tackled using some special device, which was usually only applicable to the particular problem under investigation. However in the 1990's new results in inequality and fixed point theory were used to present a very general existence theory for singular problems. This mono graph presents an up to date account of the literature on singular problems. One of our aims also is to present recent theory on singular differential and integral equations to a new and wider audience. The book presents a compact, thorough, and self-contained account for singular problems. An important feature of this book is that we illustrate how easily the theory can be applied to discuss many real world examples of current interest. In Chapter 1 we study differential equations which are singular in the independent variable. We begin with some standard notation in Section 1. 2 and introduce LP-Caratheodory functions. Some fixed point theorems, the Arzela- Ascoli theorem and Banach's theorem are also stated here.

Recenzje

From the reviews:

"In the last years, singular differential and integral equations have assumed an increasing relevance, mainly due to the great variety of problems arisen in sciences, engineering and technology which can be described by such a type of equations. ... This book presents a self-contained up to date survey on the theory available in this setting, together with a wide account to the various applications to physical problems." (Cristina Marcelli, Zentralblatt MATH, Vol. 1055 (6), 2005)

Spis treści

Preface. 1: Differential Equations Singular in the Independent Variable. 1.1. Introduction. 1.2. Preliminaries. 1.3. Initial Value Problems. 1.4. Boundary Value Problems. 1.5. Bernstein Nagumo Theory. 1.6. Method of Upper and Lower Solutions. 1.7. Solutions in Weighted Spaces. 1.8. Existence Results Without Growth Restrictions. 1.9. Nonresonant Problems. 1.10. Nonresonant Problems of Limit Circle Type. 1.11. Nonresonant Problems of Dirichlet Type. 1.12. Resonance Problems. 1.13. Infinite Interval Problems I. 1.14. Infinite Interval Problems II. 2: Differential Equations Singular in the Dependent Variable. 2.1. Introduction. 2.2. First Order Initial Value Problems. 2.3. Second Order Initial Value Problems. 2.4. Positone Problems. 2.5. Semipositone Problems. 2.6. Singular Problems. 2.7. An Alternate Theory for Singular Problems. 2.8. Singular Semipositone Type Problems. 2.9. Multiplicity Results for Positone Problems. 2.10. General Problems with Sign Changing Nonlinearities. 2.11. Problems with Nonlinear Boundary Data. 2.12. Problems with Mixed Boundary Data. 2.13. Problems with Nonlinear Left Hand Side. 2.14. Infinite Interval Problems I. 2.15. Infinite Interval Problems II. 3: Singular Integral Equations. 3.1. Introduction. 3.2. Nonsingular Integral Equations. 3.3. Singular Integral Equations with a Special Class of Kernels. 3.4. Singular Integral Equations with General Kernels. 3.5. A New Class of Integral Equations. 3.6. Singular and Nonsingular Volterra Integral Equations. Problems. References. Subject Index.