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math.PR2026
Source localisation in simple random walks
Ritesh Goenka, Peter Keevash, Tomasz PrzybyÅowski
We consider the problem of locating the source (starting vertex) of a simple random walk, given a snapshot of the set of edges (or vertices) visited in the first steps. Conside…
math.PR2025
Cutoff for generalised Bernoulli-Laplace urn models
Ritesh Goenka, Jonathan Hermon, Dominik Schmid
We introduce a multi-colour multi-urn generalisation of the Bernoulli-Laplace urn model, consisting of urns, colours, and balls, with balls of each colour and $m…