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© 2002-2007 Prof. Dr. Hans Wilhelm Alt, University of Bonn, Germany

Exercise 9 (Weak derivative)

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Weak derivative    [aufgabe:9]

Sei  Ω=]-1,1[ . Definiere  u∈L1(Ω)  durch
u(x)=
u1(x)
für x< 0,
u2(x)
für x> 0
mit  u1∈C1([-1,0])  und  u2∈C1([0,1]) . Setze
v(x)=
u1(x)
für x<0,
u2(x)
für x>0 .
Zeige, dass die Gleichung
[u]=[v]
genau dann erfüllt ist, wenn  u1(0)=u2(0)  ist (d.h. der Sprung von  u  im Punkt  x=0  ist Null).
Hinweis: Die Definition der schwachen Ableitung findet sich in sect:1-13.

Version 1.5
H.W. Alt - 02.01.2007

Exercise 8 (Differential equation of stream functions) Exercise 8 (Differential equation of stream functions)
Exercises Exercises
Exercise 10 (Gravitational potential) Exercise 10 (Gravitational potential)
Exercise 10 (Gravitational potential) Index
© 2002-2007 Prof. Dr. Hans Wilhelm Alt, University of Bonn, Germany