Correction to: Pre-compatible almost endomorphisms and semigroups whose cube is a band


1 Correction to: Semigroup Forum Vol. 67 (2003) 355–372

In the lattice of subvarieties of the variety \({ \mathcal {V} = [xyz=xywyz]}\) depicted in p. 370, the following inclusions are missing:
$$\begin{aligned}{}[xyz = xw]&\subset [xyz=xz], \\ [xyz = wz]&\subset [xyz=xz], \\ [xyz=xy]&\subset [xyz=xyw; x^3=x^2], \\ [xyz=yz]&\subset [xyz=wyz; x^3=x^2], \\ [xyz=x^2]&\subset [xwy=xvy; x^3=x^2], \\ \text {and} \quad [xyz=z^2]&\subset [xwy=xvy; x^3=x^2]. \end{aligned}$$
The complete diagram for the lattice is given in Fig. 1. None of the other results of the paper are affected by the missing inclusions.
Fig. 1

The lattice of subvarieties of \(\mathcal {V}\)



Thanks to Edmond W. H. Lee for pointing out the missing inclusions.

Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.LondonUK

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