Response by David N. Gibbs

David J.C. MacKay and Mark N. Gibbs

A GIBBS SAMPLER ON THE N - SIMPLEX By Aaron

We determine the mixing time of a simple Gibbs sampler on the unit simplex, confirming a conjecture of D. Aldous. The upper bound is based on a two-step coupling, where the first step is a simple contraction argument and the second step is a non-Markovian coupling. We also present a MCMC-based perfect sampling algorithm that is based on our proof and which can be applied to Gibbs samplers that ...

A Gibbs Sampler on the N-simplex

We determine the mixing time of a simple Gibbs sampler on the unit simplex, confirming a conjecture of D. Aldous. The upper bound is based on a two-step coupling, where the first step is a simple contraction argument and the second step is a non-Markovian coupling. We also present a MCMC-based perfect sampling algorithm that is based on our proof and which can be applied to Gibbs samplers that ...

Ron Lifshitz and N. David Mermin

To demonstrate the power of the Fourier-space approach to crystallography, the Bravais classes and © 1994 International Union of Crystallography Printed in Great Britain all rights reserved space groups of hexagonal and trigonal quasiperiodic crystals are derived for lattices of arbitrary finite rank. The specification of the space groups for each Bravais class is given by an elementary extensi...

Kathleen Kreiss and David N . Weissman

2005;128;991-997 Chest Bledsoe, Kathleen Kreiss and David N. Weissman Muge Akpinar-Elci, Kimberly J. Stemple, Paul L. Enright, John V. Fahy, Toni A. Induced Sputum Evaluation in Microwave Popcorn Production Workers This information is current as of August 24, 2006 http://www.chestjournal.org/cgi/content/full/128/2/991 located on the World Wide Web at: The online version of this article, along w...