Product Description

The Wiley-Interscience Paperback Series consists of selected books that have been made more accessible to consumers in an effort to increase global appeal and general circulation. With these new unabridged softcover volumes, Wiley hopes to extend the lives of these works by making them available to future generations of statisticians, mathematicians, and scientists.

"[A]nyone who works with Markov processes whose state space is uncountably infinite will need this most impressive book as a guide and reference."
-American Scientist

"There is no question but that space should immediately be reserved for [this] book on the library shelf. Those who aspire to mastery of the contents should also reserve a large number of long winter evenings."
-Zentralblatt für Mathematik und ihre Grenzgebiete/Mathematics Abstracts

"Ethier and Kurtz have produced an excellent treatment of the modern theory of Markov processes that [is] useful both as a reference work and as a graduate textbook."
-Journal of Statistical Physics

Markov Processes presents several different approaches to proving weak approximation theorems for Markov processes, emphasizing the interplay of methods of characterization and approximation. Martingale problems for general Markov processes are systematically developed for the first time in book form. Useful to the professional as a reference and suitable for the graduate student as a text, this volume features a table of the interdependencies among the theorems, an extensive bibliography, and end-of-chapter problems.

Product Details

• Amazon Sales Rank: #548784 in Books
• Published on: 2005-09-14
• Original language: English
• Number of items: 1
• Binding: Paperback
• 552 pages

From the Publisher
A graduate text/reference on Markov Processes and their relationship to operator semigroups. Presents several different approaches to proving weak approximation theorems for Markov processes, emphasizing the interplay of methods of characterization and approximation. Martingale problems for general Markov processes are systematically developed for the first time in book form.

From the Inside Flap
The recognition that each method for verifying weak convergence is closely tied to a method for characterizing the limiting process Sparked this broad study of characterization and convergence problems for Markov processes. A number of topics are presented for the first time in book form, such as Martingale problems for general Markov processes, powerful criteria for convergence in distribution in DE[O,???), multiple random time transformations, duality as a method of characterizing Markov processes, and characterizations of stationary distributions. The authors illustrate several different approaches to proving weak approximation theorems—operator semigroup convergence theorems, Martingale characterization of Markov processes, and representation of the processes as solutions of stochastic equations. The heart of the book reveals the main characterization and convergence results, with an emphasis on diffusion processes. Applications to branching and population processes, genetic models, and random evolutions, are given. Useful to the professional as a reference, suitable for the graduate student as a text, this volume features a table of the interdependencies among the theorems, an extensive bibliography, and end-of-chapter problems.

From the Back Cover
The Wiley-Interscience Paperback Series consists of selected books that have been made more accessible to consumers in an effort to increase global appeal and general circulation. With these new unabridged softcover volumes, Wiley hopes to extend the lives of these works by making them available to future generations of statisticians, mathematicians, and scientists.

"[A]nyone who works with Markov processes whose state space is uncountably infinite will need this most impressive book as a guide and reference."
—American Scientist

"There is no question but that space should immediately be reserved for [this] book on the library shelf. Those who aspire to mastery of the contents should also reserve a large number of long winter evenings."
—Zentralblatt für Mathematik und ihre Grenzgebiete/Mathematics Abstracts

"Ethier and Kurtz have produced an excellent treatment of the modern theory of Markov processes that [is] useful both as a reference work and as a graduate textbook."
—Journal of Statistical Physics

Markov Processes presents several different approaches to proving weak approximation theorems for Markov processes, emphasizing the interplay of methods of characterization and approximation. Martingale problems for general Markov processes are systematically developed for the first time in book form. Useful to the professional as a reference and suitable for the graduate student as a text, this volume features a table of the interdependencies among the theorems, an extensive bibliography, and end-of-chapter problems.

Customer Reviews

Accessible Treatment of a Demanding Topic
The authors have assembled a very accessible treatment of Markov process theory. The text covers three principal convergence techniques in detail: the operator semigroup characterization, the solution of the martingale problem of Stroock and Varadhan and the stochastic calculus of random time changes.

The book is reasonably self-contained, although the reader is well-advised to prepare herself with an understanding of analysis and measure theory. I recommend Rudin's Real and Complex Analysis. The authors provide an appendix which catalogues the measure-theory results they require.

The introduction to the book might be a little off-putting, particularly to readers who aren't familiar with the topic. The first-time reader should skip the introduction and head straight to Chapter 1. Once you've completed the book, the Introduction makes a wonderful synopsis.

Chapter 1 focuses on operator semigroups and builds the foundations required for the remainder of the text. The Hille-Yosida Theorem characterizing those linear operators which can be generators of 'good' semigroups is studied in depth. Generalizations of Hille-Yosida are discussed, and special attention is given to operators on function spaces.

Chapter 2 develops the material needed for the analysis of stochastic processes. After covering the basic definitions, the chapter provides a self-contained treatment of the Optional Sampling Theorem. Quadratic variation of local martingales is built-up from the variation of the sample paths. Right-continuous modifications are developed as a prelude to the Doob-Meyer Theorem. The authors provide an extremely elegant and intuitive proof of the Doob-Meyer Theorem and use the results to analyze square-integrable martingales.

Chapter 3 provides the technical results needed from the theory of convergence of probability measures. This chapter hits all the highlights that you'll find in Billingsley's Convergence of Probability Measures, including the Skorohod topology, the Prohorov metric, relative compactness and the concept of a tight family.

Chapter 4 is the core of the book. The first section introduces the notion of a Markov process. Time-homogenous transition functions are defined in terms of the Chapman-Kolmogorov property. A version of Kolmogorov's extension theorem is established to provide the existence of a Markov process corresponding to a given transition function. (Analogous results are also derived for Markov chains.) The next section gives an explicit construction of a Markov process corresponding to a particular transition function via the use of Poisson processes. The so called "jump Markov process" is used in the study of Feller semigroups. The key result is that each Feller semigroup can be realized as the transition semigroup of a strong Markov process. The remainder of chapter focuses on the development of solutions to the Martingale Problem of Stroock and Varadhan which give a Markov process corresponding to a given infinitesimal generator.

Chapter 5 develops the needed material from stochastic (Ito) calculus. The authors present the definition of Brownian motion and develop its existence via the use of Feller operator semigroups. They then move on to develop the Ito Integral as well as to state and prove Ito's formula for continuous semi-martingales. The chapter finishes with an introduction to stochastic differential equations and their solutions.

Chapter 6 is a short chapter introducing the concept of a random time change and builds from the stochastic calculus material in the previous chapter.

Chapter 7 focuses on the Martingale Central Limit Theorem along with applications in the study of convergence problems. Donsker's invariance principal is discussed and sequences which limit to stochastic diffusions are studied in-depth.

Chapter 8 represents a break from the authors' self-contained format. This chapter is really a survey from the study of generators and references material covering degenerate diffusions, non-degenerate diffusions and jump processes. A diligent reader should be able to work out the results from the hints given here.

The last part of the text covers a selection of special topics. Chapter 9 is a very short chapter and covers some of the classical and modern results from branching Markov processes. Chapters 10 and 11 review the theory from the applied setting and study genetic models and population processes. The final chapter introduces the notion of a random evolution and studies properties of these families of operators from the Markov point-of-view.

The reader will find a good selection of problems and exercises at the end of each chapter. Although not required for subsequent sections, the problems solidify the material, as well as present useful techniques.

Excellent book!
It took a little while to get mailed, but that's probably my fault for getting cheap delivery. The book is in excellent condition and they always kept me updated about its delivery status