Abstract
In this paper we continue the study of Tbk-semigroups [1]. We define a weak Tbk-semigroup as an algebra (s,·,∩) which satisfies (A1) a(bc) = (ab)c, (A2) (S, ∩) is a semilattice, (A3) × (a ∩ b) y = xay ∩ xby, (A4) a ∈ (a ∩ b) S ∩ S (a ∩ b) . We shall prove that every weak Tbk-semigroup can be embedded into a Tbk-semigroup with 1, and we shall show that the theory of [1] can be developed already in weak Tbk-semigroups.
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Klaus Wagner zum 65.Geburtstag
Über den Inhalt dieser Note berichtete der Autor verschiedene Male , zuletzt im Juni 1974 an der T.U. München.
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Bosbach, B. Schwache Teilbarkeitshalbgruppen. Semigroup Forum 12, 119–135 (1976). https://doi.org/10.1007/BF02195916
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DOI: https://doi.org/10.1007/BF02195916