Mathematics – Probability
Scientific paper
2003-05-22
Annals of Probability 32 (2004), pp. 915--938.
Mathematics
Probability
To appear in Annals Probab. 6 figures Only change in new version is addition of proof (at end of article) that the state (1,0,
Scientific paper
We consider a Markov chain on the space of (countable) partitions of the interval [0,1], obtained first by size biased sampling twice (allowing repetitions) and then merging the parts (if the sampled parts are distinct) or splitting the part uniformly (if the same part was sampled twice). We prove a conjecture of Vershik stating that the Poisson-Dirichlet law with parameter theta=1 is the unique invariant distribution for this Markov chain. Our proof uses a combination of probabilistic, combinatoric, and representation-theoretic arguments.
Diaconis Persi
Mayer-Wolf Eddy
Zeitouni Ofer
Zerner Martin
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