Understanding the history of chemical space through big data (Online lecture, BrightTALK, November 2021)
Mathematical chemistry (Montevideo, Uruguay, July 2013)
Looking for the Best QSAR and Docking Methods (Sheffield, UK, July 2013)
Indiscretion of mathematics in chemistry, orders and neighbourhoods (Caracas, Venezuela, November 2012)
Posetic complexity (Berlin, Germany, September 2012)
The periodic table, from similarities, neighbourhoods and networks to topologies (Cusco, Peru, August 2012)
A Macondian society of chemical substances (Bogota, Colombia, August 2011)
Looking for concepts in chemistry (Bogota, Colombia, July 2010)
The ins and outs of the periodic table (Kolkata, India, January 2010)
The importance of ordering in chemistry: Ranking and predicting substances' properties (Bogota, Colombia, August 2009)
Mathematical chemistry, a new field of research (Santiago de Cali, Colombia, August 2009)
Philosophy of chemistry and mathematical chemistry, two sides of the same coin? (Bogota, Colombia, July 2009)
Element's neighbourhoods and the Periodic Table (Cartagena, Colombia, July 2009)
Quimiotopología (Bucaramanga, Colombia, March 2009)
Química matemática (Pamplona, Colombia, March 2009)
¿Sirve poner orden en química? (Bucaramanga, Colombia, March 2009)
Discrete Taylor series as a simple way to predict characteristics of chemical substances like benzenes and cubanes [Presented by Jaime Nava] (El paso, USA, November 2008)
Forward and reverse posetic cluster expansions of methyl cubanes (El Paso, USA, October 2008)
Chemistry: A language, an algebra (Coburg, Germany, August 2008)
Turning partial orders into total orders, a step-by-step approach (Duluth, USA, June 2008)
EnviroInfo 2007, 21st International Conference on Informatics for Environmental Protection, Warsaw, Poland, September 12 - 14 2007.
The 22nd International Course & Conference on the Interfaces among Mathematics, Chemistry & Computer Sciences, Dubrovnik, Croatia, June 21 - 26 2007.
International Conference of Computational Methods in Sciences and Engineering 2006, Chania, Greece, October 30 - November 1 2006.
Workshop on Ranking Methods and Multicriteria Decision Analysis in Environmental Sciences, Verbania, Italy, October 2 - 3 2006.
Chemical elements, a topological space? (Madrid, Spain, August 2006)
XXXI International Congress of Theoretical Chemist of Latin Expression, Margarita island, Venezuela, October 2 - 6 2005.
9th WSEAS International Conference on COMPUTERS, Athens, Greece, July 14 - 16 2005.
Fourth Indo-US Workshop on Mathematical Chemistry, Pune, India, January 8 - 12 2005.
International Conference of Computational Methods in Sciences and Engineering 2004, Athens, Greece, November 19 - 23 2004.
The Nineteenth International Course & Conference on the Interfaces among Mathematics, Chemistry & Computer Sciences, Dubrovnik, Croatia, June 21 - 26 2004.
Third Joint Sheffield Conference on Chemoinformatics, Sheffield, UK, April 21 - 23 2004.
V Seminar of advances studies on molecular design and bioinformatics, Havana, Cuba, February 2 - 6 2004.
4th Northeastern Symposium of Mathematics, Bucaramanga, Colombia, December 9 - 12 2003.
Regional Conference on Learning Assessment and Superior Education Teaching, Bucaramanga, Colombia, December 5 - 7 2003.
1st National Chemistry Week, Bucaramanga, Colombia, October 27 - 31 2003.
The Second Harry Wiener International Memorial Conference: The Periodic Table, into the 21st century, Banff, Canada, July 14 - 20 2003.