Generalized range of slow random walks on trees

Pierre Andreoletti (1) , Alexis Kagan (1)

1 IDP - Institut Denis Poisson

In this work we are interested in the set of visited vertices of a tree T by a randomly biased random walk X := (Xn, n ∈ N). The aim is to study a generalized range, that is to say the volume of the trace of X with both constraints on the trajectories of X and on the trajectories of the underlying branching random potential V := (V (x), x ∈ T). Focusing on slow regime's random walks (see [HS16b], [AC18]) we prove a general result and detail examples. These examples exhibit many different behaviors for a wide variety of ranges, showing the interactions between trajectories of X and the ones of V.

Mots clés: randomly biased random walks; branching random walks; range

Domaines: Mathématiques [math]; Probabilités [math.PR]

Pierre Andreoletti, Alexis Kagan. Generalized range of slow random walks on trees. 2021. ⟨hal-03420519v1⟩