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
Ascenso MX Ascenso MX The Ascenso MX is the second professional level of the Mexican football league system. The champion of the competition is promoted to Liga MX (top-flight division). The bottom team gets relegated to Liga Premier (the third tier). It is currently sponsored by BBVA through its Mexican subsidiary BBVA Bancomer, and thus officially known as Ascenso BBVA Bancomer. Formerly known as Primera División A (First Division A) the league changed its name and competition format in 2009 to Liga de Ascenso. It was rebranded as Ascenso MX in 2012. The main changes are that clubs now do not need