不断有许多只言片语的数学传闻从导师传到学生或者从同事传到同事，但这些常常是模糊的，而在正式文献中去进行讨论又显得不甚严肃。通常对知道这种“数学传说”的人来说也只是个碰巧的机会而已。但是到了今天，这样一些只言片语也可通过研究博客这种半正式的媒体进行有效和高效率的传播。这本书便是由博客产生的。
Preface
A remark on notation
Acknowledgments
Chapter 1． Expository Articles
§1．1． The blue-eyed islanders puzzle
§1．2． Kleiner's proof of Gromov's theorem
§1．3． The van der Corput lemma， and equidistribution on nilmanifolds
§1．4． The strong law oflarge numbers
§1．5． Tate's proof of the functional equation
§1．6． The divisor bound
§1．7． The Lucas-Lehmer test for Mersenne primes
§1．8． Finite subsets of groups with no finite models
§1．9． Small samples， and the margin of error
§1．10． Non-measurable sets via non-standard analysis
§1．11． A counterexample to a strong polynomial Freiman-Ruzsa conjecture
§1．12． Some notes on "non-classical" polynomials in finite characteristic
§1．13． Cohomology for dynamical systems
Chapter 2． Ergodic Theory
§2．1． Overview
§2．2． Three categories of dynamical systems
§2．3． Minimal dynamical systems， recurrence， and the Stone-Cechcompactification
§2．4． Multiple recurrence
§2．5． Other topological recurrence results
§2．6． Isometric systems and isometric extensions
§2．7． Structural theory of topological dynamical systems
§2．8． The mean ergodic theorem
§2．9． Ergodicity
§2．10． The Furstenberg correspondence principle
§2．11． Compact systems
§2．12． Weakly mixing systems
§2．13． Compact extensions
§2．14． Weakly mixing extensions
§2．15． The Furstenberg-Zimmer structure theorem and the Furstenberg recurrence theorem
§2．16． A Ratner-type theorem for nilmanifolds
§2．17． A Ratner-type theorem for S/2（R） orbits
Chapter 3． Lectures in Additive Prime Number Theory
§3．1． Structure and randomness in the prime numbers
§3．2． Linear equations in primes
§3．3． Small gaps between primes
§3．4． Sieving for almost primes and expanders
Bibliography
Index
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