Prove that the derivative of the Cantor Function is zero almost everywhere.












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Construct a continuous increasing function $f:[0,1] to [0,1]$ such that $f(0) = 0$, $f(1)=1$ and $f'(x) = 0$ in a open dense set.




The Cantor Function works. I know that the derivative of Cantor Function is zero almost everywhere, but I cannot prove it. Can someone help me?










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  • 6




    $begingroup$
    Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
    $endgroup$
    – Andrés E. Caicedo
    Jan 3 at 20:34
















0












$begingroup$



Construct a continuous increasing function $f:[0,1] to [0,1]$ such that $f(0) = 0$, $f(1)=1$ and $f'(x) = 0$ in a open dense set.




The Cantor Function works. I know that the derivative of Cantor Function is zero almost everywhere, but I cannot prove it. Can someone help me?










share|cite|improve this question









$endgroup$








  • 6




    $begingroup$
    Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
    $endgroup$
    – Andrés E. Caicedo
    Jan 3 at 20:34














0












0








0





$begingroup$



Construct a continuous increasing function $f:[0,1] to [0,1]$ such that $f(0) = 0$, $f(1)=1$ and $f'(x) = 0$ in a open dense set.




The Cantor Function works. I know that the derivative of Cantor Function is zero almost everywhere, but I cannot prove it. Can someone help me?










share|cite|improve this question









$endgroup$





Construct a continuous increasing function $f:[0,1] to [0,1]$ such that $f(0) = 0$, $f(1)=1$ and $f'(x) = 0$ in a open dense set.




The Cantor Function works. I know that the derivative of Cantor Function is zero almost everywhere, but I cannot prove it. Can someone help me?







real-analysis metric-spaces






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share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Jan 3 at 20:31









Lucas CorrêaLucas Corrêa

1,5581421




1,5581421








  • 6




    $begingroup$
    Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
    $endgroup$
    – Andrés E. Caicedo
    Jan 3 at 20:34














  • 6




    $begingroup$
    Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
    $endgroup$
    – Andrés E. Caicedo
    Jan 3 at 20:34








6




6




$begingroup$
Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
$endgroup$
– Andrés E. Caicedo
Jan 3 at 20:34




$begingroup$
Check that the Cantor function is constant on each connected component of the complement of the Cantor set. This should be essentially immediate by construction.
$endgroup$
– Andrés E. Caicedo
Jan 3 at 20:34










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