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On finite $$\mathcal J$$-trivial monoids. (English) Zbl 0435.20036

##### MSC:
 20M07 Varieties and pseudovarieties of semigroups 20M20 Semigroups of transformations, relations, partitions, etc.
##### Keywords:
M-variety; monoid of reflexive relations; finite monoids
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##### References:
 [1] Eilenberg, S.,Automata, Languages and Machines, Academic Press, New York, 1974 (vol. A) and 1976 (vol. B). · Zbl 0317.94045 [2] Simon, I.,Piecewise Testable Events inAutomata Theory and Formal Languages, 2nd GI Conference, Springer Lecture Notes in Computer Science 33 (1975) 214–222.
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