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UBA - CienciaS :: Ver Tema - 2do parcial 2do cuatri 2010
UBA - CienciaS
http://ubacs.com.ar/ubacs/

2do parcial 2do cuatri 2010
http://ubacs.com.ar/ubacs/viewtopic.php?f=308&t=2334
Página 1 de 1

Autor:  ALE [ 30 Dic 2010, 01:31 ]
Asunto:  2do parcial 2do cuatri 2010

Ejercicio 1
Sea M la sup inducida por la parametrización donde y sea N el cilindro de radio R. Consideramos con
a) Siendo la carta de M inducida por la param y la carta de N tal que y . si y escribir en la base
b) ¿es f conforme?
Ejercicio 2
Sea M una sup y (U,x) una carta tal que los coef de la 1ra forma fund son : . Sea diferenciable tal que y
a) Si encontrar tal que y
b) Calcular las coordenadas locales del campo gradiente de f con respecto a (U,x) (recordar que
Ejercicio 3
Sea una sup parametrizada por con
a)Calcular curvaturas gaussiana y media de
b) Decidir, segun si el punto es elíptico parabólico hiperbólico o plnar.

Autor:  ALE [ 30 Dic 2010, 01:35 ]
Asunto:  Re: 2do parcial 2do cuatri 2010

Ejercicio 4
Sea M una sup conexa tal que todos sus puntos son umbílicos. Probar que está incluida en una esfera o en un plano.
Ejercicio 5
Sea una isom local y c una geodésica de M. Probar que foc es una geodésica de N

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