Abstract
We discuss in this chapter a number of problems of random walks with self- attracing path ineteractions which are all closely related to large deviation theory. A simple case of an attraction would be just to change sign in the (weakly) self repellent case of Chapter 1. For technical reasons, it is convenient to work with continuous time but discrete state space Markov processes. Therefore, we consider the standard symmetric random walk on ℤ d starting in 0 having holding times with expectation 1/d. The path measure on the space D ∞ = D([0,∞), ℤ d for the set of paths of length T. As usual, we write X t (ω)= ωt, ω∈ D ∞ for the evaluation map. We then transform the path measure in the same way as in the weakly repellent case, just having the opposite sign of the coupling constant:
starting in 0 having holding times with expectation 1/{itd}. The path measure on the space
Keywords
- Brownian Motion
- Random Walk
- Variational Problem
- Large Deviation Principle
- Maximum Entropy Principle
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© 2002 Springer-Verlag Berlin Heidelberg
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(2002). Self-attracting random walks. In: Bernard, P. (eds) Lectures on Probability Theory and Statistics. Lecture Notes in Mathematics, vol 1781. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-47944-9_3
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DOI: https://doi.org/10.1007/3-540-47944-9_3
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-43736-9
Online ISBN: 978-3-540-47944-4
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