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arxiv: 1103.4529 · v1 · pith:ZHDJQHVEnew · submitted 2011-03-23 · 🧮 math.PR

Ordered random walks with heavy tails

classification 🧮 math.PR
keywords randomchamberwalksweylasymptoticbehaviourconditionednote
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This note continues paper of Denisov and Wachtel (2010), where we have constructed a $k$-dimensional random walk conditioned to stay in the Weyl chamber of type $A$. The construction was done under the assumption that the original random walk has $k-1$ moments. In this note we continue the study of killed random walks in the Weyl chamber, and assume that the tail of increments is regularly varying of index $\alpha<k-1$. It appears that the asymptotic behaviour of random walks is different in this case. We determine the asymptotic behaviour of the exit time, and, using thisinformation, construct a conditioned process which lives on a partial compactification of the Weyl chamber.

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