Conferences
- ``Topology meeting,'' Trieste, Italy, September 1978
- ``Gnsaga meeting,'' Perugia, Italy, March 1980
- ``Conference on the mathematical foundation of programming semantics,''
Kansas State University, Manhattan, KS, April 1985
- ``AMS-MAA joint meetings,'' New Orleans, LA, January 1986
- ``International conference in category theory,'' Catholic University
of Louvain, Louvain-La-Neuve, Belgium, July 1987
- ``CAT-TOP Prague 88,'' Mathematics Institute of Charles University,
Prague, Czechoslovakia, August 1988
- ``IV SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Humacao, Puerto Rico, February 1989
- ``V SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Arecibo, Puerto Rico, February 1990
- ``855th AMS meeting,'' Kansas State University,
Manhattan, KS, March 1990
- ``A workshop in categorical topology,'' University of Toledo,
Toledo, Ohio, September 1991
- ``VII SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Mayagüez, Puerto Rico, February 1992
- ``IX SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Humacao, Puerto Rico, February 1994
- ``A workshop in categorical topology,'' University of L'Aquila,
L'Aquila, Italy, September 1994
- ``XI SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Arecibo, Puerto Rico, April 1996
- ``XII SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Mayagüez, Puerto Rico, February 1997
- ``XIII SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Humacao, Puerto Rico, February 1998
- ``International Symposium on Applications of Categorical Methods,''
University of Antwerp, Belgium, March 1998
- ``International Conference on Georgian-influenced Mathematics,''
Kent State University, Kent, Ohio, August 1998
- ``Category Theory 99,''
University of Coimbra, Coimbra, Portugal, July 1999
- ``XV SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Mayagüez, Puerto Rico, February 2000
- ``CatMat 2000 - Categorical Methods in Algebra and Topology,''
University of Bremen, Germany, August 2000
- ``XVIII SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Ponce, Puerto Rico, February 2003
- ``XIX SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Cayey, Puerto Rico, February 2004
- ``XX SIDIM (Seminario Interuniversitario de Investigacion Matematica),''
Mayagüez, Puerto Rico, February 2005
- ``XXII SIDIM (Seminario Interuniversitario de Investigaci\'on Matematica),''
Ponce, Puerto Rico, February 2007
- ``XXIV SIDIM (Seminario Interuniversitario de Investigaci\'on Matematica),''
Rio piedras, Puerto Rico, March 2009
- ``XXV SIDIM (Seminario Interuniversitario de Investigaci\'on Matematica),''
Mayagüez, Puerto Rico, February 2010
- ``Catop2010 - Workshop on Categorical Topology,''
University of the Azores, Ponta Delgada, Portugal, March 2010
- ``XXVII SIDIM (Seminario Interuniversitario de Investigaci\'on Matematica),''
Mayagüez, Puerto Rico, February 2012
- ``XXIX SIDIM (Seminario Interuniversitario de Investigaci\'on Matematica),''
Ponce, Puerto Rico, February 2014