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Math Help - Weak derivatives

  1. #1
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    Weak derivatives

    Dear all,

    I'm trying to solve a little exercise, to conclude I need to prove that a continuous function in a limited square of R^2 with continuous weak derivatives is C^1.
    Has somebody an idea?

    Thank you!

    Valentina
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  2. #2
    MHF Contributor
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    Re: Weak derivatives

    Hey Paul87.

    For those of us un-aware of what a weak derivative is, can you enlighten us?
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