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On semidirect products of two finite semilattices. (English) Zbl 0527.20046


MSC:

20M07 Varieties and pseudovarieties of semigroups
20M10 General structure theory for semigroups
68Q45 Formal languages and automata

Citations:

Zbl 0359.94067
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References:

[1] Aho, Hopcroft, Ullman. The Design and Analysis of Computer Algorithms, Addision Wesley (1974) · Zbl 0326.68005
[2] J. Brozozowski and J. Simon, Characterizations of locally testable events, Discrete Mathematics, vol. 4 (1973), 243–271. · Zbl 0255.94032
[3] S. Eilenberg, Automata, Languages and Machines, vol. B, Academic Press, New York (1976) · Zbl 0359.94067
[4] J. Karnofsky and J. Rhodes, Deciadability of complexity one-half for finite semigroups. Semigroup Forum, vol. 24 (1982), 55–66. · Zbl 0503.20028
[5] G. Lallement, Semigroups and combinatorial applications, Wiley, New York (1979) · Zbl 0421.20025
[6] H. Neumann, Varieties of groups, Springer (1967) · Zbl 0149.26704
[7] J.-E. Pin, Variétés de langages et variétés de semigroupes Thèse Paris (1981)
[8] J.-E. Pin, Hiérarchies de concaténation. (To appear).
[9] J.-E. Pin, A decidability result on finite semigroups, submitted.
[10] D. Thérien, Classification of finite monoids. The language approach, Theoretical Computer Science 14 (1981), 195–208. · Zbl 0471.20055
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