I need help for the following question.
Do the partial derivatives of the function f(x,y)=min(|x|,|y|) exist and what are they?
Also, I don't think the function is differentiable at (0,0) but how should I prove this from definition?
Many thanks!
I need help for the following question.
Do the partial derivatives of the function f(x,y)=min(|x|,|y|) exist and what are they?
Also, I don't think the function is differentiable at (0,0) but how should I prove this from definition?
Many thanks!
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