Caicedo is emeritus professor of mathematics at the Universidad de los Andes and was associate catedra professor in the department of mathematics of the Universidad Nacional de Colombia, Bogotá, until 2010. A dedicated researcher and respected teacher, he has been responsible for the development of the field of mathematical logic in Colombia, and continues his excellent work on the model theory of extensions of first order logic and on algebraizable and modal logics. A fellow of the Academia Colombiana de Ciencias Exactas, Fisicas y Naturales, and of the Academia de Ciencias de America Latina y el Caribe, he has won the Colombian Academy's prize for the sustained work of a scientist, the Universidad Nacional Medal of Merit, and the Colombian Mathematical Society National Prize.

de la Cruz is A-1 researcher, Centro Atómico Bariloche-CNEA (retired since 2007), and hon. prof. of physics, Instituto Balseiro. After his PhD (1968) at the Instituto Balseiro (Universidad de Cuyo), he did postdoctoral work at Brown Univ. He returned to Bariloche, Argentina, in 1971, where he has been professor and researcher at the Centro Atómico and Instituto Balseiro for 36 years. His awards include: Teófilo Isnardi, Academia de Ciencias; Chevalier des Palmes Academic, France; Ricardo Gans, Universidad de la Plata; Premio Konex Platino, Fundacion Konex; and Premio Fundación Bunge Born a la Ciencia, 2004. He is fellow of APS and IOP; member, Academia Nacional de Ciencias and Academia de Ciencias Físicas y Naturales, Argentina; and foreign member, US National Academy of Sciences. Premio Houssay en Física 2010 He has been advisor of 23 PhD students and over 30 master students in physics.