Presentations at Universities and Conferences

A graphical approach to free objects in Rees-Sushkevich varieties, Algebraic Conference, Novi Sad, Serbia, August 2009.

Varieties and Pseudovarieties Generated by Completely 0-simple semigroups, International Conference on Representations of Groups and Semigroups, Tel Aviv, Israel, January 2008.

Varieties generated by completely 0-simple semigroups, International Algebraic Conference, Ekaterinburg, Russia, September 2005.

Strict e-varieties are varietal, Workshop on General Algebra, Klagenfurt, Austria, June 2003.

Shades of Orthodoxy in Rees-Sushkevich Varieties, International Workshop on Semigroups, Automata and Formal Languages, Crema, Italy, June 2002.

The Equational Theory of Completely 0-Simple Semigroups, Department of Algebra, University of Granada, Spain, May 2000.

Varieties and pseudovarieties generated by D-chains, Semigroups and Applications, St Andrews, Scotland, July 1997.

An application of kernel and trace to lattices of varieties, Institute of Mathematics, Yunnan University, Kunming, China, August 1996.

A decomposition of the lattice of pseudovarieties, International Conference on Semigroups and their applications, Prague, Czeck Republic, July 1996.

Congruences and operations on lattices of varieties, e-varieties and pseudovarieties, International Conference on Semigroups, St. Petersburg, Russia, June 1995.

International Conference on Semigroups and Algebras of Computer Languages, Qingdao, China, May 1993.

The Class of completely regular syntactic monoids of prefix codes, The Second International Symposium on Words, Languages and Combinatorics, Kyoto, Japan, August 1992.

Cross-sections of symmetric inverse semigroups, Conference on semigroups, Luino, Italy, June 1992.

Conference on Semigroup Theory, Oberwolfach, Germany, July 1991.

Northwest University, Xian, China, June 1991.

South East Asia Mathematical Society Meeting, Hong Kong, June 1991.

Conference on Semigroup Theory and its Application, Marquette University, Milwaukee, Wisconsin, March 1991.

International Symposium on Semigroup Theory and related fields, Ritsumeikan University, Kyoto, Japan, August 1990.

International Colloquium on Words, languages and combinatorics, Kyoto Sangyo University, Kyoto, Japan, August 1990.

Conference on Semigroup Theory, Monash University, Melbourne, Australia, July 1990.

Conference on Non-Commutative Algebra (Main speaker - 5 lectures), June 1989, Lecce, Italy.

Canadian Mathematical Society, Winter Meeting, Toronto, Ontario, Canada, December 1988.

University of Porto, Porto, Portugal, June 1988.

International Conference on Algebra, Lisbon, Portugal, June 1988.

Conference on Non-Commutative Algebra (Main speaker - 5 lectures), Siena, Italy, June 1987.

Australian Mathematical Society Annual Meeting, Geelong, Australia, May 1987.

Algebra Meeting, Melbourne, Victoria, Australia, May 1987.

University of Waterloo, Ontario, Canada, September 1986.

University of California, Berkeley, April 1986.

Conference on Semigroups and applications, Chico, California, USA, April 1986.

University of Calgary, Alberta, Canada, February 1986.

University of Alberta, Edmonton, Alberta, Canada, February 1986.

Conference on Semigroups, (Combinatorial Aspects), Oberwolfach, Germany, February 1986.

Institut fur Mathematik, Vienna, Austria, June 1985.

Fachbereich Mathematik, Kaiserlautern, W. Germany, June 1985.

Institut de Programmation, Uni. Paris VI, Paris, France, June, 1985.

Workshop on lattice ordered groups (5 lectures), Bowling Green State University, Ohio, USA, May 1985.

Conference on Ordered Algebraic Systems, Marseilles, France, June 1984.

Conference on Universal Algebra, Vienna, Austria, June 1984.

AMS Annual Meeting, Louisville, Kentucky, January 1984.

Conference on ordered sets, Lyon, France, July 1982.

Bowling Green State University, Ohio, USA, January 1982.

AMS Conference, Cincinatti, Ohio, USA, January 1982.

Conference on Semigroups, Szeged, Hungary, August 1981.

Mathematics Institute, Vienna, Austria, June 1981.

Conference on Semigroups, Oberwolfach, Germany, May 1981.
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Conference on General Algebra, Vienna, Austria, May 1980.

Math colloquium, University of Montpellier, Montpellier, Hérault, France, April 1980.

Seminar Dubreil-Malliavin, Institut Henri Poincare, Paris, France, March 1980.

Conference on Regular Semigroups, University of Northern Illinois, Dekalb, Illinois, USA, April 1979.

Math Colloquium, University of Nebraska, Lincoln, Nebraska, USA, April 1979.

Conference on Semigroup Theory, Tulane University, New Orleans, Louisiana, September 1978.

Math colloquium, University of Alberta, Edmonton, Alberta, Canada, April 1977.

Conference on Semigroup Theory, Jozsef Attila University, Szeged, Hungary, August 1976.

Invited paper to Session on Ordered Groups, A.M.S. Summer meeting, Kalamazoo, Michigan, USA, August 1975.

Semigroup Conference, (Splinter session) International Congress of Mathematics, Vancouver, British Columbia, Canada, August 1974.

Math colloquium, Tulane University, New Orleans, Louisiana, October 1974.

Math Colloquium, University of Stirling, Scotland, January 1974.

Math Colloquium, University of Glasgow, Scotland, December 1973.

Semigroups conference, Northern Illinois University, DeKalb, Illinois, February 1973.

Math colloquium, The Flinder University of New South Wales, Australia, April 1971.

Math colloquium, La Trobe University, Melbourne, Australia, April 1971.

Math colloquium, University of Stirling, Scotland, March 1970.

Math colloquium, University of Glasgow, Scotland, March 1970.

Math colloquium, Ireland, February 1970.

Math colloquium, Trinity College, Dublin, Ireland, February 1970.

Math colloquium, St. Andrew's University, Scotland, February 1970.


	Presentations at Universities and Conferences A graphical approach to free objects in Rees-Sushkevich varieties, Algebraic Conference, Novi Sad, Serbia, August 2009. Varieties and Pseudovarieties Generated by Completely 0-simple semigroups, International Conference on Representations of Groups and Semigroups, Tel Aviv, Israel, January 2008. Varieties generated by completely 0-simple semigroups, International Algebraic Conference, Ekaterinburg, Russia, September 2005. Strict e-varieties are varietal, Workshop on General Algebra, Klagenfurt, Austria, June 2003. Shades of Orthodoxy in Rees-Sushkevich Varieties, International Workshop on Semigroups, Automata and Formal Languages, Crema, Italy, June 2002. The Equational Theory of Completely 0-Simple Semigroups, Department of Algebra, University of Granada, Spain, May 2000. Varieties and pseudovarieties generated by D-chains, Semigroups and Applications, St Andrews, Scotland, July 1997. An application of kernel and trace to lattices of varieties, Institute of Mathematics, Yunnan University, Kunming, China, August 1996. A decomposition of the lattice of pseudovarieties, International Conference on Semigroups and their applications, Prague, Czeck Republic, July 1996. Congruences and operations on lattices of varieties, e-varieties and pseudovarieties, International Conference on Semigroups, St. Petersburg, Russia, June 1995. International Conference on Semigroups and Algebras of Computer Languages, Qingdao, China, May 1993. The Class of completely regular syntactic monoids of prefix codes, The Second International Symposium on Words, Languages and Combinatorics, Kyoto, Japan, August 1992. Cross-sections of symmetric inverse semigroups, Conference on semigroups, Luino, Italy, June 1992. Conference on Semigroup Theory, Oberwolfach, Germany, July 1991. Northwest University, Xian, China, June 1991. South East Asia Mathematical Society Meeting, Hong Kong, June 1991. Conference on Semigroup Theory and its Application, Marquette University, Milwaukee, Wisconsin, March 1991. International Symposium on Semigroup Theory and related fields, Ritsumeikan University, Kyoto, Japan, August 1990. International Colloquium on Words, languages and combinatorics, Kyoto Sangyo University, Kyoto, Japan, August 1990. Conference on Semigroup Theory, Monash University, Melbourne, Australia, July 1990. Conference on Non-Commutative Algebra (Main speaker - 5 lectures), June 1989, Lecce, Italy. Canadian Mathematical Society, Winter Meeting, Toronto, Ontario, Canada, December 1988. University of Porto, Porto, Portugal, June 1988. International Conference on Algebra, Lisbon, Portugal, June 1988. Conference on Non-Commutative Algebra (Main speaker - 5 lectures), Siena, Italy, June 1987. Australian Mathematical Society Annual Meeting, Geelong, Australia, May 1987. Algebra Meeting, Melbourne, Victoria, Australia, May 1987. University of Waterloo, Ontario, Canada, September 1986. University of California, Berkeley, April 1986. Conference on Semigroups and applications, Chico, California, USA, April 1986. University of Calgary, Alberta, Canada, February 1986. University of Alberta, Edmonton, Alberta, Canada, February 1986. Conference on Semigroups, (Combinatorial Aspects), Oberwolfach, Germany, February 1986. Institut fur Mathematik, Vienna, Austria, June 1985. Fachbereich Mathematik, Kaiserlautern, W. Germany, June 1985. Institut de Programmation, Uni. Paris VI, Paris, France, June, 1985. Workshop on lattice ordered groups (5 lectures), Bowling Green State University, Ohio, USA, May 1985. Conference on Ordered Algebraic Systems, Marseilles, France, June 1984. Conference on Universal Algebra, Vienna, Austria, June 1984. AMS Annual Meeting, Louisville, Kentucky, January 1984. Conference on ordered sets, Lyon, France, July 1982. Bowling Green State University, Ohio, USA, January 1982. AMS Conference, Cincinatti, Ohio, USA, January 1982. Conference on Semigroups, Szeged, Hungary, August 1981. Mathematics Institute, Vienna, Austria, June 1981. Conference on Semigroups, Oberwolfach, Germany, May 1981. ; Conference on General Algebra, Vienna, Austria, May 1980. Math colloquium, University of Montpellier, Montpellier, Hérault, France, April 1980. Seminar Dubreil-Malliavin, Institut Henri Poincare, Paris, France, March 1980. Conference on Regular Semigroups, University of Northern Illinois, Dekalb, Illinois, USA, April 1979. Math Colloquium, University of Nebraska, Lincoln, Nebraska, USA, April 1979. Conference on Semigroup Theory, Tulane University, New Orleans, Louisiana, September 1978. Math colloquium, University of Alberta, Edmonton, Alberta, Canada, April 1977. Conference on Semigroup Theory, Jozsef Attila University, Szeged, Hungary, August 1976. Invited paper to Session on Ordered Groups, A.M.S. Summer meeting, Kalamazoo, Michigan, USA, August 1975. Semigroup Conference, (Splinter session) International Congress of Mathematics, Vancouver, British Columbia, Canada, August 1974. Math colloquium, Tulane University, New Orleans, Louisiana, October 1974. Math Colloquium, University of Stirling, Scotland, January 1974. Math Colloquium, University of Glasgow, Scotland, December 1973. Semigroups conference, Northern Illinois University, DeKalb, Illinois, February 1973. Math colloquium, The Flinder University of New South Wales, Australia, April 1971. Math colloquium, La Trobe University, Melbourne, Australia, April 1971. Math colloquium, University of Stirling, Scotland, March 1970. Math colloquium, University of Glasgow, Scotland, March 1970. Math colloquium, Ireland, February 1970. Math colloquium, Trinity College, Dublin, Ireland, February 1970. Math colloquium, St. Andrew's University, Scotland, February 1970.