### Convergence rates of Markov chains on spaces of partitions

**Harry Crane**

*(Rutgers University)*

**Steven P. Lalley**

*(University of Chicago)*

#### Abstract

We study the convergence rate to stationarity for a class of exchangeable partition-valued Markov chains called cut-and-paste chains. The law governing the transitions of a cut-and-paste chain are determined by products of i.i.d. stochastic matrices, which describe the chain induced on the simplex by taking asymptotic frequencies. Using this representation, we establish upper bounds for the mixing times of ergodic cut-and-paste chains, and under certain conditions on the distribution of the governing random matrices we show that the "cutoff phenomenon" holds.

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Pages: 1-23

Publication Date: June 13, 2013

DOI: 10.1214/EJP.v18-2389

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