Contemporary Mathematics Guillermo L´opez Lagomasino: mathematical life Francisco Marcell´ an and Andrei Mart´ınez-Finkelshtein This paper is obviously dedicated to the 60th Birthday of our friend, Guillermo (Bill) L´opez Lagomasino Abstract. This is a very brief account of the biography of Guillermo L´opez Lagomasino, up to the date of publication. Along with a description of the major events in Guillermo’s life, we try to describe both the social events and mathematical environment within which his mathematical contributions, analyzed in an accompanying paper by B. de La Calle, were obtained. 1. Introduction This paper, based on a presentation of the second author at the International Workshop on Orthogonal Polynomials and Approximation Theory 2008 (IWOPA’08), and available at, is a very brief account of Guillermo’s biography, with several digressions. This article will play a supporting role for the paper in this volume by B. de la Calle, where some of Guillermo’s math- ematical contributions are discussed. We think that it is valuable to put them into the framework in which they were obtained. Moreover, Guillermo’s life has been anything but boring, and explaining briefly the social contexts where he moved can also be illuminating. 2. First years Guillermo opez Lagomasino was born in Havana, Cuba, on December 21, 1948, a single child of an electrician (his father) and a schoolteacher (his mother). At the age of eight (in March, 1957, a few months after Fidel Castro with a bunch of people returned secretly from an exile in Mexico on a small yacht named Granma and disembarked in Cuba, starting a guerrilla war), his family emigrated to the United States. These were tough times, and Guillermo’s father, as so many people, 1991 Mathematics Subject Classification. Primary 01A70. Secondary 01A60. The first author was partially supported by the Direcci´ on General de Investigaci´ on, Ministerio de Educaci´ on y Ciencias of Spain, research project MTM-13000-C03-02. The second author was partially supported by Junta de Andaluc´ ıa, grants FQM-229, FQM- 481, and P06-FQM-01735, as well as by the research project MTM2008-06689-C02-01 from the Ministry of Science and Innovation of Spain and the European Regional Development Fund (ERDF). c 0000 (copyright holder) 1 Volume 507, 2010 c 2010 American Mathematical
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