Workshop on Groups and Semigroups

on the occasion of the

José Carlos Costa, University of Minho, Portugal Volker Diekert, University of Stuttgart, Germany Vítor Hugo Fernandes, University NOVA of Lisbon, Portugal Marcel Jackson, La Trobe University, Melbourne, Australia Olga Kharlampovich, Hunter College, New York, USA Edmond W. H. Lee, Nova Southeastern University, Florida, USA Alexei Myasnikov, Stevens Institute of Technology, New Jersey, USA Norman R. Reilly, Simon Fraser University, Canada Mark Sapir, Vanderbilt University, Nashville, USA Olga Sapir, Vanderbilt University, Nashville, USA Lev Shneerson, Hunter College, New York, USA Efim Zelmanov, University of California San Diego, USA

Jorge Almeida, University of Porto, Portugal João Araújo, University Aberta, Portugal Karl Auinger, University of Vienna, Austria
Wolfram Bentz, University of Lisbon, Portugal Alan Cain, Center of Mathematics and Applications, Univ. NOVA of Lisbon, Portugal Laure Daviaud, LIAFA, Univ. Paris-Diderot, France Gracinda Gomes, University of Lisboa, Portugal Victoria Gould, University of York, UK Robert Gray, East Anglia University, UK Peter Jones, Marquette University, USA Mark Kambites, University of Manchester, UK Ondrej Klíma, Masaryk University, Czech Republic
Veny Liu, University of Alabama, USA Emanuel Rodaro, Center of Mathematics, Univ. of Porto, Portugal John Rhodes, University of California at Berkeley, USA
M. Hossein Shahzamanian, University of Porto/CMUP, Portugal Pedro Silva, University of Porto, Portugal Filipa Soares de Almeida, Polytechnic of Lisbon/CEMAT-UL, Portugal Itamar Stein, Bar-Ilan University, Israel Benjamin Steinberg, City College, New York, USA Nóra Szakács, University of Szeged, Hungary
Boris M. Vernikov, Ural Federal University, Russia Mikhail Volkov, Ural Federal University, Ekaterinburg, Russia Marc Zeitoun, University of Bordeaux, France