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The spread of a catalytic branching random walk

Philippe Carmona, Yueyun Hu (2014)

Annales de l'I.H.P. Probabilités et statistiques

We consider a catalytic branching random walk on that branches at the origin only. In the supercritical regime we establish a law of large number for the maximal position M n : For some constant α , M n n α almost surely on the set of infinite number of visits of the origin. Then we determine all possible limiting laws for M n - α n as n goes to infinity.

The triangle and the open triangle

Gady Kozma (2011)

Annales de l'I.H.P. Probabilités et statistiques

We show that for percolation on any transitive graph, the triangle condition implies the open triangle condition.

The unscaled paths of branching brownian motion

Simon C. Harris, Matthew I. Roberts (2012)

Annales de l'I.H.P. Probabilités et statistiques

For a set A ⊂ C[0, ∞), we give new results on the growth of the number of particles in a branching Brownian motion whose paths fall within A. We show that it is possible to work without rescaling the paths. We give large deviations probabilities as well as a more sophisticated proof of a result on growth in the number of particles along certain sets of paths. Our results reveal that the number of particles can oscillate dramatically. We also obtain new results on the number of particles near the...

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