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AuthorLawler, Gregory F. author
TitleIntersections of Random Walks [electronic resource] / by Gregory F. Lawler
ImprintBoston, MA : Birkhรคuser Boston : Imprint: Birkhรคuser, 1991
Connect tohttp://dx.doi.org/10.1007/978-1-4612-0771-9
Descript IV, 225 p. online resource

SUMMARY

A more accurate title for this book would be "Problems dealing with the non-intersection of paths of random walks. " These include: harmonic measure, which can be considered as a problem of nonintersection of a random walk with a fixed set; the probability that the paths of independent random walks do not intersect; and self-avoiding walks, i. e. , random walks which have no self-intersections. The prerequisite is a standard measure theoretic course in probability including martingales and Brownian motion. The first chapter develops the facts about simple random walk that will be needed. The discussion is self-contained although some previous expoยญ sure to random walks would be helpful. Many of the results are standard, and I have made borrowed from a number of sources, especially the exยญ cellent book of Spitzer [65]. For the sake of simplicity I have restricted the discussion to simple random walk. Of course, many of the results hold equally well for more general walks. For example, the local central limit theorem can be proved for any random walk whose increments have mean zero and finite variance. Some of the later results, especially in Section 1. 7, have not been proved for very general classes of walks. The proofs here rely heavily on the fact that the increments of simple random walk are bounded and symmetric


CONTENT

1 Simple Random Walk -- 2 Harmonic Measure -- 3 Intersection Probabilities -- 4 Four Dimensions -- 5 Two and Three Dimensions -- 6 Self-Avoiding Walks -- 7 Loop-Erased Walk


Mathematics Probabilities Mathematics Probability Theory and Stochastic Processes



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