3 research outputs found
Computable bounds of -spectral gap for discrete Markov chains with band transition matrices
We analyse the -convergence rate of irreducible and aperiodic
Markov chains with -band transition probability matrix and with
invariant distribution . This analysis is heavily based on: first the
study of the essential spectral radius of
derived from Hennion's quasi-compactness criteria; second
the connection between the Spectral Gap property (SG) of on
and the -geometric ergodicity of . Specifically, (SG)
is shown to hold under the condition \alpha\_0 := \sum\_{{m}=-N}^N
\limsup\_{i\rightarrow +\infty} \sqrt{P(i,i+{m})\, P^*(i+{m},i)}\ \textless{}\,
1 Moreover . Effective bounds on
the convergence rate can be provided from a truncation procedure.Comment: in Journal of Applied Probability, Applied Probability Trust, 2016.
arXiv admin note: substantial text overlap with arXiv:1503.0220
Additional material on bounds of -spectral gap for discrete Markov chains with band transition matrices
We analyse the -convergence rate of irreducible and aperiodic
Markov chains with -band transition probability matrix and with
invariant distribution . This analysis is heavily based on: first the
study of the essential spectral radius of
derived from Hennion's quasi-compactness criteria; second
the connection between the spectral gap property (SG) of on
and the -geometric ergodicity of . Specifically, (SG)
is shown to hold under the condition \alpha\_0 := \sum\_{{m}=-N}^N
\limsup\_{i\rightarrow +\infty} \sqrt{P(i,i+{m})\, P^*(i+{m},i)}\ \textless{}\,
1. Moreover . Simple conditions
on asymptotic properties of and of its invariant probability distribution
to ensure that \alpha\_0\textless{}1 are given. In particular this
allows us to obtain estimates of the -geometric convergence rate
of random walks with bounded increments. The specific case of reversible is
also addressed. Numerical bounds on the convergence rate can be provided via a
truncation procedure. This is illustrated on the Metropolis-Hastings algorithm