Concentration of measures via size biased couplings
Abstract
Let be a nonnegative random variable with mean and finite positive variance , and let , defined on the same space as , have the size biased distribution, that is, the distribution characterized by E[Yf(Y)]=\mu E f(Y^s) for all functions for which these expectations exist. Under a variety of conditions on the coupling of Y and , including combinations of boundedness and monotonicity, concentration of measure inequalities hold. Examples include the number of relatively ordered subsequences of a random permutation, sliding window statistics including the number of m-runs in a sequence of coin tosses, the number of local maximum of a random function on a lattice, the number of urns containing exactly one ball in an urn allocation model, the volume covered by the union of balls placed uniformly over a volume n subset of d dimensional Euclidean space, the number of bulbs switched on at the terminal time in the so called lightbulb process, and the infinitely divisible and compound Poisson distributions that satisfy a bounded moment generating function condition.
Cite
@article{arxiv.0906.3886,
title = {Concentration of measures via size biased couplings},
author = {Subhankar Ghosh and Larry Goldstein},
journal= {arXiv preprint arXiv:0906.3886},
year = {2011}
}
Comments
Concentration results for the number of isolated vertices have been removed from this version, and with corrections, posted jointly with Martin Raic in http://arxiv.org/abs/1106.0048