Technion, IEM faculty
 
- Seminar in Probability and Stochastic Processes
 
Speaker: Eviatar Procaccia, Weizmann Institute
 
Title:   The need for speed : Maximizing random walks speed on fixed
         environments
 
Date:    29/11/2011
 
Time:    11:30
 
Place:   Hashmal-861
 
Abstract:  <http://ie.technion.ac.il/seminar_files/1321433028_E.txt>
 
Or read this:
 
We study nearest neighbor random walks on fixed environments of
$\mathbb{Z}$ composed of two point types :
$(\frac{1}{2},\frac{1}{2})$ and $(p,1-p)$ for $p>\frac{1}{2}$.
We show that for every environment with density of $p$ drifts
bounded by $\lam$ we have
$\limsup_{n\rightarrow\infty}\frac{X_n}{n}\leq (2p-1)\lam$,
where $X_n$ is a random walk on the environment. In addition up
to some integer effect the environment which gives the best
speed is given by equally spaced drifts
 
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