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Math Help - Interesting partial derivative question

  1. #1
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    Interesting partial derivative question

    Hey Friends,

    Take a look at the following function:

    f(x,y,z)=0 if x<y
    f(x,y,z)=z if x>=y

    What are the partial derivatives of the function, with respect to x and y, separately? i.e., what is df/dx and df/dy

    Thanks for your help.
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  2. #2
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    Looks like \frac{\partial f}{\parital x} = \frac{\partial f}{\parital y} = 0 but why?
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