A shape theorem and semi-infinite geodesics for the Hammersley model with random weights

Details A shape theorem and semi-infinite geodesics for the Hammersley model with random weights A shape theorem and semi-infinite geodesics for the Hammersley model with random weights

2010-01-26

arxiv.org/abs/1001.4706v3

ALEA, Lat. Am. J. Probab. Math. Stat. 8, 163--175 (2011)

Mathematics

Probability

12 pages

Scientific paper

In this paper we will prove a shape theorem for the last passage percolation model on a two dimensional $F$-compound Poisson process, called the Hammersley model with random weights. We will also provide diffusive upper bounds for shape fluctuations. Finally we will indicate how these results can be used to prove existence and coalescence of semi-infinite geodesics in some fixed direction $\alpha$, following an approach developed by Newman and co-authors, and applied to the classical Hammersley process by W\"uthrich. These results will be crucial in the development of an upcoming paper on the relation between Busemann functions and equilibrium measures in last passage percolation models.

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