Guillermo Morales-Luna is a Researcher at Cinvestav-IPN since 1985. He received a Ph.D in Mathematics from the Polish Academy of Sciences, Poland. From 1989 to 1992 he chaired the Cinvestav Computer Science Section. He has refereed texts and books edited by the Sociedad Matemática Mexicana, the Universidad Auto'noma Metropolitana and IPN. He has received several grants for research and technology projects from Mexican CONACyT, UNESCO, PEMEX and the Mexican Institute of Telecommunications. His research interest areas include Logic (model theory, Peano arithmetic, proof theory) and mathematical foundations of Computer Science (recursive functions, computational complexity and algorithms).