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October 29th, 2011, 05:46 PM   #1
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differentiable function

Find all p and q that function
is defferentiable in . Does anyone give any clue?
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October 31st, 2011, 02:09 PM   #2
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Re: differentiable function

We can show that is differentiable if (I guess it's in the sum) (the identically map is the differential), and not differentiable if . In the case , consider the two sub-cases or .
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