The MathNet Korea
Information Center for Mathematical Science

PAC

Information Center for Mathematical Science

PAC

On the spectral analysis of second-order Markov chains
Author Persi Diaconis (Stanford University)
Homepage Url http://www-stat.stanford.edu/~cgates/PERSI/year.html
Coauthors Laurent Miclo
Abstract Second order Markov chains which are trajectorially reversible are considered. Contrary to the reversibility notion for usual Markov chains, no symmetry property can be deduced for the corresponding transition operators. Nevertheless and even if they are not diagonalizable in general, we study some features of their spectral decompositions and in particular the behavior of the spectral gap under appropriate perturbations is investigated. Our quantitative and qualitative results confirm that the resort to second order Markov chains is an interesting option to improve the speed of convergence to equilibrium.
Abstract Url http://www-stat.stanford.edu/~cgates/PERSI/papers/second.pdf