Le séminaire a lieu le mardi à 11 h 45 (sauf modification exceptionnelle), au campus Côte de Nacre, bâtiment Sciences 3, salle S3 351, 3ème étage.
Résumé du séminaire du Lundi 23 Mars 2020 à 11:45
Analogies between groups and subshifts : Higman type theorems for subshifts
par Pascal Vannier (LACL, Paris-Est Créteil)
Subshifts are sets of colorings of Z² by a finite alphabet that avoid some family of forbidden patterns. We investigate here some analogies with group theory that were first noticed by Emmanuel Jeandel. In particular we will show theorems on subshifts inspired by Higman's embedding theorems of group theory, among which, the fact that subshifts with a computable language can be obtained as restrictions of minimal subshifts of finite type.
This is joint work with Emmanuel Jeandel.