The join of the pseudovarieties of idempotent semigroups and locally trivial semigroups

@inproceedings{Zeitoun1996TheJO,
  title={The join of the pseudovarieties of idempotent semigroups and locally trivial semigroups},
  author={Marc Zeitoun},
  year={1996}
}
This article solves a problem proposed by Almeida: the computation of the join of two well-known pseudovarieties of semigroups, namely the pseudovariety of bands and the pseudovariety of locally trivial semigroups. We use a method developed by Almeida, based on the theory of implicit operations. 

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