Ergodic Theory of Numbers

by ;
Format: Hardcover
Pub. Date: 2002-06-01
Publisher(s): Mathematical Assn of Amer
List Price: $26.75

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Summary

This book is an introduction to the ergodic theory behind common number expansions, for instance decimal expansions, continued fractions and many others. The questions studied are dynamical as well as number theoretic in nature, and the answers are obtained with the help of ergodic theory. What it means to be ergodic and the basic ideas behind ergodic theory are explained along the way. The book is aimed at introducing students with sufficient background knowledge in real analysis to a 'dynamical way of thinking'. The subjects covered vary from the classical to recent research which should increase the appeal of this book to researchers working in the field.

Author Biography

Karma Dajani earned her PhD from George Washington University in Washington, DC. Before accepting her current position at the University of Utrecht in the Netherlands Cor Kraaikamp studied mathematics at the Universiteit van Amsterdam where he earned his PhD. He spent a year as a post-doc in the United States at the University of Maryland in College Park, and the University of Washington in Seattle until he was appointed at Delft in the Netherlands

Table of Contents

Introduction
1(32)
Decimal expansions of rational numbers
2(3)
Another look at the decimal expansion
5(15)
Continued fractions
20(11)
For further reading
31(2)
Variations on a theme (Other expansions)
33(24)
n-ary expansions
33(3)
Luroth series
36(5)
Generalized Luroth series
41(10)
β-expansions
51(6)
Ergodicity
57(32)
The Ergodic Theorem
57(14)
Examples of normal numbers
71(2)
β-transformations
73(3)
Ergodic properties of the β-expansion
76(4)
Ergodic properties of continued fractions
80(9)
Systems obtained from other systems
89(26)
GLS-expansion and β-expansion: A first glimpse at their connection
89(3)
Induced and integral transformations
92(6)
Natural extensions
98(3)
Natural extension of the GLS transformation
101(3)
Natural extension of the β-transformation
104(8)
For further reading
112(3)
Diophantine approximation and continued fractions
115(40)
Introduction
115(10)
The natural extension of the regular continued fraction
125(1)
Approximation coefficients revisited
126(8)
Other continued fractions
134(17)
A skew product related to continued fractions
151(3)
For further reading
154(1)
Entropy
155(24)
Introduction
155(14)
The Shannon-McMillan-Breiman Theorem and some consequences
169(6)
Saleski's Theorem
175(2)
For further reading
177(2)
Bibliography 179(8)
Index 187

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