Varieties of Semigroups

João Araújo (Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Center for Mathematics and Applications and CEMAT-CIÊNCIAS)
João Pedro Araújo (Instituto Superior Técnico, Novos talentos em Matemática, Fundação Calouste Gulbenkian)
Peter J. Cameron (School of Mathematics and Statistics & CIRCA, University of St Andrews, Scotland; CEMAT-CIÊNCIAS, University of Lisbon)
Edmond W. H. Lee (Nova Southeastern University, Florida)
Jorge Raminhos (Universidade Aberta and CEMAT-CIÊNCIAS)
This project has been partially supported by the Fundação para a Ciência e a Tecnologia through the project CEMAT-CIÊNCIAS UID/Multi/04621/2013, and through project “Hilbert’s 24th problem” PTDC/MHC-FIL/2583/2014.
Any comments are welcome: raminhosj@gmail.com