Slowdown for the geodesic-biased random walk
Probability
2019-09-13 v1 Combinatorics
Abstract
Given a connected graph with some subset of its vertices excited and a fixed target vertex, in the geodesic-biased random walk on , a random walker moves as follows: from an unexcited vertex, she moves to a uniformly random neighbour, whereas from an excited vertex, she takes one step along some fixed shortest path towards the target vertex. We show, perhaps counterintuitively, that the geodesic-bias can slow the random walker down exponentially: there exist connected, bounded-degree -vertex graphs with excitations where the expected hitting time of a fixed target is at least .
Cite
@article{arxiv.1909.05616,
title = {Slowdown for the geodesic-biased random walk},
author = {Mikhail Beliayeu and Petr Chmel and Bhargav Narayanan and Jan Petr},
journal= {arXiv preprint arXiv:1909.05616},
year = {2019}
}
Comments
11 pages, submitted