%0 Conference Proceedings %T Group-Walking Automata %+ Universidad de Chile = University of Chile [Santiago] (UCHILE) %+ University of Turku %A Salo, Ville %A Törmä, Ilkka %Z Part 2: Regular Papers %< avec comité de lecture %( Lecture Notes in Computer Science %B 21st Workshop on Cellular Automata and Discrete Complex Systems (AUTOMATA) %C Turku, Finland %Y Jarkko Kari %3 Cellular Automata and Discrete Complex Systems %V LNCS-9099 %P 224-237 %8 2015-06-08 %D 2015 %R 10.1007/978-3-662-47221-7_17 %K Group-walking automaton %K Torsion group %K Periodic group %K Multi-headed automaton %K Subshift %Z Computer Science [cs]Conference papers %X In the setting of symbolic dynamics on discrete finitely generated infinite groups, we define a model of multi-headed finite automata that walk on Cayley graphs, and use it to define subshifts. We characterize the torsion groups (also known as periodic groups) as those on which the group-walking automata are strictly weaker than Turing machines. %G English %Z TC 1 %Z WG 1.5 %2 https://inria.hal.science/hal-01442475/document %2 https://inria.hal.science/hal-01442475/file/338243_1_En_17_Chapter.pdf %L hal-01442475 %U https://inria.hal.science/hal-01442475 %~ IFIP-LNCS %~ IFIP %~ IFIP-TC %~ IFIP-TC1 %~ IFIP-LNCS-9099 %~ IFIP-WG1-5 %~ IFIP-AUTOMATA