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Speed of random walks
If you have a question about this talk, please contact Julia Blackwell.
How fast does a random walk on a graph escape from its starting point? In this survey talk, I will consider this question in a variety of settings:
Simple RW on Galton-Watson trees, where speed can be computed
RW on lamplighter groups: The Kaimanovich-Vershik Theorem
Which escape exponents are possible for RW on groups?
Benjamini-Lyons-Schramm conjecture: percolation preserves speed of RW
The effect of bias for RW on trees and on groups
Surprisingly, the expected distance from the starting point can be non-monotone, even when starting at the stationary distribution and the walk has holding probability 1/2.
*The square root lower bound on groups: Can it be proved beyond the inverse spectral gap?
This talk is part of the Probability series.
This talk is included in these lists:
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Other listsMarket Square – The Cambridge Business & Society Interdisciplinary Research Group Cambridge University Southeast Asia Forum The Audrey Richards Annual Lecture in African Studies
Other talks(SP Wednesday Workshop) - TBC “How does natural selection shape development?” Southern Namibia Cambridge Immunology Forum 2014 The 2015 Forensic Forums Coins and currency in the crusader states