Santiago López de Medrano Santiago López de Medrano Santiago López de Medrano Sánchez (born October 15, 1942 in Mexico City) is a Mexican mathematician, who works as a researcher at the National Autonomous University of Mexico (UNAM). His research has concerned knot theory, singularity theory, biomathematics, and differential topology. López de Medrano did his undergraduate studies at UNAM, and earned his Ph.D. from Princeton University in 1969, under the supervision of William Browder. He returned to UNAM as a researcher and professor in 1968, and was president of the Mexican Mathematical Society from 1969 to 1973. López de Medrano presented his work on knot
David Toledo came from the penalty spot in the 62nd minute. In January 2018, Toledo moved to Alebrijes de Oaxaca in the Ascenso MX. He scored his first goal in the league in a 3-0 victory on 13 January 2018 against Correcaminos UAT. It came from the penalty spot in the 16th minute. Atlante F.C. Pumas UNAM Tigres UANL David Toledo José David Toledo Bosquez (born 18 April 1982) is a former Mexican footballer who last played as a midfielder for Alebrijes de Oaxaca. Toledo started his professional career with Pumas UNAM in 2001. He made over 80 Primera Division appearances for