Semigroup Forum

, Volume 40, Issue 1, pp 297–313 | Cite as

Weakly exponential Δ-semigroups

  • Attila Nagy
Research Article


A semigroup whose congruences form a chain with respect to inclusion is called a Δ-semigroup. Schein [8] and Tamura [9] described the commutative Δ-semigroups, Etterbeek [3] characterized the medial Δ-semigroups and Trotter [10] generalized their results for exponential Δ-semigroups.

The purpose of this paper is to extend the examination to obtain a description of weakly exponential Δ-semigroups.


Arbitrary Element Proper Ideal Rectangular Band Normal Complex Idempotent Element 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag New York Inc 1990

Authors and Affiliations

  • Attila Nagy
    • 1
  1. 1.Department of Mathematics Transport Engineering FacultyTechnical University of BudapestBudapest, XI.Hungary

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