EVENT DETAILS AND ABSTRACT

Title: Restrictions on the automorphism group of a fixed subshift
Speaker: Samuel Petite
Speaker Info: University of Picardie
Brief Description:
Special Note:
Abstract:

A subshift is a closed set of sequences on a finite alphabet and invariant by the shift. An automorphism is an homeomorphism commuting with the shift map. Actually, it is a cellular automaton. It follows that the set of the automorphisms preserving a subshift is a countable group generally hard to describe. We will present in this talk a survey on different restrictions on these groups for zero entropy subshifts.