A nowhere continuous derivative?
August 1, 2008 7:23 PM Subscribe
Is there a differentiable function f(x) such that the derivative is nowhere continuous? That is, f'(x) has no point of continuity?
posted by thrako to Science & Nature (16 answers total) 4 users marked this as a favorite
Googling has led me to believe this does not exist, though I can't find anything like a proof, only vague references to Baire classes.
Can you tell me where I would find a proof?