Biased branching random walks on Bienaymé--Galton--Watson trees

Julien Berestycki, Nina Gantert, David Geldbach +1

We study $\lambda$-biased branching random walks on Bienaymé--Galton--Watson trees in discrete time. We consider the maximal displacement at time $n$, $\max_{\vert u \vert =n} \vert X(u)…