Department of

Mathematics


Seminar Calendar
for events the day of Wednesday, September 23, 2020.

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Wednesday, September 23, 2020

3:00 pm in Zoom Meeting (email daesungk@illinois.edu for info),Wednesday, September 23, 2020

Empirical distributions (and another variational formula) in first-passage percolation on trees

Erik Bates (University of Wisconsin-Madison)

Abstract: This talk will address the same topic as Tuesday's probability seminar, but in a simplified setting: we replace the d-dimensional integer lattice with the infinite d-ary tree. In this "mean-field" case, we are able to completely resolve the question of convergence for empirical distributions along FPP geodesics. The proof, which will be presented in full, leads to two interesting threads of discussion. The first concerns the difference between lattice percolation and tree percolation; here I invite discussion of an open problem. The second thread is a corollary of our methods, namely a fact about convergence of measures which I have not seen before. The talk should be accessible to all, and I will not assume that any part of Tuesday's seminar is remembered.