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Percolation and Isoperimetric Inequalities

By Elisabetta Candellero, University of Warwick

In this talk we will discuss some relations between percolation on a given graph G and its geometry.

There are several interesting questions relating various properties of G such as growth (or dimension) and the process of percolation on it.

In particular we will look for conditions under which its critical percolation threshold is non-trivial, that is: p_c(G) is strictly between zero and one.

In a very influential paper on this subject, Benjamini and Schramm asked whether it was true that for every graph satisfying dim(G) > 1, one has p_c(G) < 1.  We will explain this question in detail and present some recent results that have been obtained in this direction.

This talk is based on a joint work with Augusto Teixeira (IMPA, Rio de Janeiro, Brazil).

Later Event: March 25
Coffee Break