f'=0 a.e => f constant ?
From: Julien Santini (santini.julien_at_wanadoo.fr)
Date: 09/01/04
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Date: Wed, 1 Sep 2004 16:32:36 +0200
Hello
How could I show that if f is absolutely continuous, almost everywhere
differentiable on the interval (a,b) and such that f '(x)=0 a.e, then f is
constant ?
-- Julien Santini
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