who shared fun, work, and, mostly, friendship with us, iv the people who helped me to settle in Gainesville, especially Kepler Euclides and Otto Junqueira, the friends we will leave here in the USA, especially the families Berger, Ferwerda, and Gaham, who gave us a lot of attention my friends in Brazil, especially Silamar Ferraz who spent his time caring for my interests, with much help from Cristina P. Martins my relatives in Brazil, especially my mother, sisters, uncle