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» On Reversible Automata
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MCU
1998
170views Hardware» more  MCU 1998»
15 years 11 days ago
About the Universality of the Billiard ball model
Block cellular automata (BCA) make local, parallel, synchronous and uniform updates of in nite lattices. In the one-dimensionalcase, there exist BCA with 11 states which are unive...
Jérôme Olivier Durand-Lose
TCS
2008
14 years 11 months ago
On varieties of meet automata
Eilenberg's variety theorem gives a bijective correspondence between varieties of languages and varieties of finite monoids. The second author gave a similar relation between...
Ondrej Klíma, Libor Polák
COCO
2010
Springer
215views Algorithms» more  COCO 2010»
15 years 2 months ago
Symmetry Coincides with Nondeterminism for Time-Bounded Auxiliary Pushdown Automata
—We show that every language accepted by a nondeterministic auxiliary pushdown automaton in polynomial time (that is, every language in SAC1 = Log(CFL)) can be accepted by a symm...
Eric Allender, Klaus-Jörn Lange
ATVA
2005
Springer
132views Hardware» more  ATVA 2005»
15 years 4 months ago
Flat Counter Automata Almost Everywhere!
Abstract. This paper argues that flatness appears as a central notion in the verification of counter automata. A counter automaton is called flat when its control graph can be ...
Jérôme Leroux, Grégoire Sutre
CORR
2010
Springer
86views Education» more  CORR 2010»
14 years 8 months ago
Time-Symmetric Cellular Automata
Together with the concept of reversibility, another relevant physical notion is time-symmetry, which expresses that there is no way of distinguishing between backward and forward t...
Andrés Moreira, Anahí Gajardo