The averaging trick and the Černý conjecture
DLT'10 Proceedings of the 14th international conference on Developments in language theory
Slowly synchronizing automata and digraphs
MFCS'10 Proceedings of the 35th international conference on Mathematical foundations of computer science
An algorithm for road coloring
Journal of Discrete Algorithms
Synchronizing automata of bounded rank
CIAA'12 Proceedings of the 17th international conference on Implementation and Application of Automata
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In this paper, we establish the Černý-Pin conjecture for automata with the property that their transition monoid cannot recognize the language {a,b}* ab{a,b}*. For the subclass of automata whose transition monoids have the property that each regular -class is a subsemigroup, we give a tight bound on lengths of reset words for synchronizing automata thereby answering a question of Volkov.