Scenery reconstruction on finite abelian groups

作者：Finucane Hilary; Tamuz Omer^*; Yaari Yariv

来源：Stochastic Processes and Their Applications, 2014, 124(8): 2754-2770.

DOI：10.1016/j.spa.2014.03.012

• Scenery reconstruction
• Random walks
• Finite abelian groups

We consider the question of when a random walk on a finite abelian group with a given step distribution can be used to reconstruct a binary labeling of the elements of the group, up to a shift. Matzinger and Lember (2006) give a sufficient condition for reconstructability on cycles. While, as we show, this condition is not in general necessary, our main result is that it is necessary when the length of the cycle is prime and larger than 5, and the step distribution has only rational probabilities. We extend this result to other abelian groups.

• 出版日期2014-8