On divisors of pseudovarieties generated by some classes of full transformation semigroups
Fernandes, Vítor Hugo
Algebra Colloquium, 15 (2008), 581 - 588
In this paper we present a division theorem for the pseudovariety of semigroups 𝖮𝖣 (𝖮𝖱) generated by all semigroups of order-preserving or order-reversing (orientation-preserving or orientation-reversing) full transformations on a finite chain.
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