Finite monoids and the fine structure of NC1
Journal of the ACM (JACM)
Languages recognized by finite aperiodic groupoids
Theoretical Computer Science
Automata, Languages, and Machines
Automata, Languages, and Machines
Varieties Of Formal Languages
Finite Loops Recognize Exactly the Regular Open Languages
ICALP '97 Proceedings of the 24th International Colloquium on Automata, Languages and Programming
Learning Expressions over Monoids
STACS '01 Proceedings of the 18th Annual Symposium on Theoretical Aspects of Computer Science
Complete Classifications for the Communication Complexity of Regular Languages
STACS '03 Proceedings of the 20th Annual Symposium on Theoretical Aspects of Computer Science
Proceedings of the 2nd GI Conference on Automata Theory and Formal Languages
The Complexity of Computing over Quasigroups
Proceedings of the 14th Conference on Foundations of Software Technology and Theoretical Computer Science
Finite groupoids and their applications to computational complexity
Finite groupoids and their applications to computational complexity
Bounded-depth circuits: separating wires from gates
Proceedings of the thirty-seventh annual ACM symposium on Theory of computing
Faithful Loops for Aperiodic E-Ordered Monoids
ICALP '09 Proceedings of the 36th Internatilonal Collogquium on Automata, Languages and Programming: Part II
Conservative groupoids recognize only regular languages
LATA'12 Proceedings of the 6th international conference on Language and Automata Theory and Applications
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Finite semigroups, i.e. finites sets equipped with a binary associative operation, have played a role in theoretical computer science for fifty years. They were first observed to be closely related to finite automata, hence, by the famous theorem of Kleene, to regular languages. It was later understood that this association is very deep and the theory of pseudo-varieties of Schützenberger and Eilenberg [5] became the accepted framework in which to discuss computations realized by finite-state machines. It is today fair to say that semigroups and automata are so tightly intertwined that it makes little sense to study one without the other.