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
Ricardo Ferretti World Cup, Ferretti was once again called up to be the interim manager for friendly matches against Uruguay, the United States, Costa Rica, and Chile. Ricardo Ferretti Ricardo Ferretti de Oliveira (born February 22, 1954) is a Brazilian-born Mexican former professional footballer and current manager of Liga MX club Tigres UANL. Ferretti has held Mexican citizenship since 2006. He is commonly referred to by his nickname Tuca. A midfielder, Ferretti spent most of his playing career with Pumas UNAM. He also played for Botafogo, Vasco da Gama and Bonsucesso in his native Brazil, and Atlas, Neza, Monterrey and Toluca in