Plínio Garcez de Sena (1926 - 1989)

Norbert Freinkel (1926?1989)

During the twentieth century, Norbert Freinkel studied hormones [2] and diabetes in the United States. Freinkel conducted many experiments that enabled him to determine the factors that influence hormones [2] of the thyroid gland and how those hormones [2] affect surrounding tissues. Furthermore, Freinkel studied gestational diabetes, which is diabetes that occurs for the first time during a wo...

Professor Russell L. De Valois 1926–2003

On 20 September, 2003, Professor Russell L. De Valois died from injuries sustained in an automobile accident ten days earlier. For more than four decades, Russell De Valois had been a leading figure in the study of brain and behavior. With the passing of Russell De Valois, the vision science community lost a brilliant scientist, an inspirational colleague, and a dear friend. Russell De Valois w...

The Caraka-tattvapradipika of Sivadasa Sena

In this article the author describes the salient features of Carakatattvapradipika, a commentary on the Caraka Samhita by Sivadasa sena and highlights his theory and practice of medicine.

Documentos de trabajo Poverty in Uruguay (1989-1997)

ALGEBRA III (Curso 1989-90) Teoŕia de conjuntos

Ejercicio 1. Probar que para cualesquiera conjuntos a, b y c se tiene que: (1) a ⊆ a. (2) a ⊆ b ∧ b ⊆ a =⇒ a = b. (3) a ⊆ b ∧ b ⊆ c =⇒ a ⊆ c. (4) ∅ ⊆ a. Ejercicio 2. Probar que para cualesquiera conjuntos a, b y c Idenpotentes a ∪ a = a a ∩ a = a Conmutativas a ∪ b = b ∪ a a ∩ b = b ∩ a Asociativas a ∪ (b ∪ c) = (a ∪ b) ∪ c a ∩ (b ∩ c) = (a ∩ b) ∩ c Absorcin a ∩ (a ∪ b) = a a ∪ (a ∩ b) = a Dist...