| Title |
Locale |
| Workshop on Semigroups 2012 (to remember John M. Howie on the occasion of his 76th birthday) |
Instituto para a Investigação Interdisciplinar da Universidade de Lisboa, Lisboa, Portugal, 23-25/05/2012 (Organizing Committee) |
| The second international congress in algebras and combinatorics, dedicated to the 70 birthday of Leonid A. Bokut |
Beijing, China, 6-11/07/2007 and Xi'an, China, 12-15/07/2007 |
| Fountainfest "Semigroups, categories and automata", a conference celebrating John Fountain's 65th birthday and his mathematical achievements |
University of York, UK, 12-14/10/2006 (Invited Speaker) |
| Algebra and Discrete Mathematics - Symmetries and Ordered Structures under the Influence of Model Theory and Combinatorics |
Hattingen (near Essen), Germany, 26-31/07/2003 (Invited Speaker) |
| Structural Theory of Automata, Semigroups and Universal Algebra |
University of Montreal, Canada, 07-18/07/2003 |
| International Meeting on Semigroup Theory and Related Topics |
University of Minho, Braga, Portugal, 25-28/06/2003 (Invited Speaker) |
| International Workshop on Semigroups and Languages |
CAUL, Lisbon, Portugal, 27-29/11/2002 (Organizing Committee) |
