Presentations

   
  University of Bremen, Germany, 1979, 1988, 2004.
  University of Hagen, Germany, 1979.
  Kansas State University, 1979, 1988.
  Conference on General Topology and Modern Analysis, University of California, Riverside, 1980.
  Fifth Prague Topological Symposium, Czechoslovakia, 1981.
  Marshall University, 1982, 1984.
  University of Edinburgh, Scotland, 1983.
  Washington University, St. Louis, 1984.
  Iowa State University, 1984.
  Workshop on Category Theory and Computer Programming, University of Surrey, England, 1985.
  IEEE Computer Society's Tenth Annual International Computer Software and Applications Conference, Chicago, 1986.
  Summer Conference on Category Theory and Computer Science, University of Edinburgh, Scotland, 1987.
  South Bank Polytechnic, London, 1987.
  University of Tulane, 1988.
  University of Copenhagen, 1988, 1990.
  Fourth International Workshop on the Mathematical Foundations of Programming Semantics, University of Colorado, 1988 (invited speaker).
  International Workshop on Categorical Methods in Computer Science, Free University of Berlin, 1988 (invited speaker).
  Cat-Top, International Workshop on Category Theory and Topology, Prague, Czechoslovakia, 1988.
  University of Tulsa, 1989, 1992.
  University of Darmstadt, Germany, 1989.
  International Workshop on Domain Theory and Databases, Darmstadt, Germany, 1989 (invited speaker).
  University of Aarhus, Denmark, 1989.
  Second Annual Oregon Workshop on Software Metrics, Portland State University, Oregon, 1990.
  Sixth International Workshop on the Mathematical Foundations of Programming Semantics, University of Kingston, Ontario, Canada, 1990.
  Bellman Continuum Conference, Kansas State University, 1990.
  Workshop on Category Theory Applied: Paradigmatic Topics, University of Bremen, Germany, 1990.
  Oklahoma State University, 1990.
  University of Pennsylvania, 1990.
  International Conference on the Mathematical Foundations of Programming Semantics 91, Carnegie-Mellon University, 1991.
  British Computer Society's One-day Workshop on Formal Aspects of Measurement, South Bank Polytechnic, London, 1991.
  University of Cape Town, 1991, 2004 (two talks).
  South African Graduate Students Research Symposium, 1992 (invited speaker).
  (Southern African) Lecturers in Computer Science Symposium, 1992 (invited speaker).
  Seventh Southern African Computer Research Symposium, South Africa,1992 (invited speaker).
  Workshop on Formal Aspects on Computer Science, University of Cape Town, 1992 (invited speaker).
  Meiji University, Tokyo, Japan, 1993.
  Osaka University, Japan, 1993.
  Kansas State University, Undergraduate Mathematics Lecture Series, 1993.
  First Asian Fuzzy Systems Symposium, Singapore, 1993.
  Second Workshop on Formal Aspects on Computer Science, University of Cape Town, 1994 (invited speaker).
  The Associated Colleges of Central Kansas Computer Science Departments, McPherson College, McPherson, Kansas. Two lectures: one on Lagois connections and one on ethics. 1996.
  Symposium on Modern Undergraduate Mathematics, Brisbane, Australia, 1997.
  1992 International Simulation Technology Conference and 1992 Workshop on Neural Networks, Clear Lake, Texas, 1992.
  International Symposium on Applications of Categorical Methods, Antwerp, Belgium, 1998 (invited speaker).
  International Conference on Georgian Influenced Mathematics, Kent State University, 1998 (invited speaker).
  International Symposium on Undergraduate Mathematics Education, The Challenge of Diversity, Laguna Quays, Queensland,
Australia, 1999.
  First Southern African Summer School and Workshop on Logic, Universal Algebra and Theoretical Computer Science, 1999 (invited speaker, four lectures).
  Third Southern Hemisphere Symposium on Undergraduate Mathematics Teaching, Kruger National Park, South Africa, 2001.
  4th International Conference on Enterprise Information Systems, Spain, April 2002 (poster session).
  RECAM'02, (Regional Campus Mathematics Conference), Kent State University Stark Campus, 2002 (invited speaker).
  2nd International Conference on the Teaching of Mathematics, Crete, Greece, July 2002.
  Fourth Southern Hemisphere Symposium on Undergraduate Mathematics Teaching, Queensland, New Zealand, 2003.
  University of Stellenbosch, South Africa, 2004 (two talks).
  Fifth Southern Hemisphere Symposium on Undergraduate Mathematics Teaching, Australia, 2005.
  Youngstown State University, 2006.
  Technology Symposium, McGill University, Montreal, Canada, 2006.
  Tenth Prague Topological Symposium, Czech Republic, 2006.
  Fourth International Conference on the Book, Boston, Massachusetts, 2006.
  Technology Conference, Cambridge University, England, 2007.
  16th International Conference on Software Engineering and Data Engineereing, Las Vegas, Nevada, 2007.
  Categorical Methods in Algebra, Topology and Computer Science Workshop, University of Coimbra, Portugal, 2007.
  29th Linz Seminar on Fuzzy Set Theory: Foundations of Lattice-Valued Mathematics with Applications to Algebra and Topology, Linz, Austria, 2008.
  The 2008 International Conference on Software Engineering Research and Practice (poster session), WorldComp'08, Las Vegas, 2008.
 

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