Just one question:
how was the function given: like f(x) = ;or y= ;or like what you posted?
f = x^4 + y^4 - 4xy
I know how to find the critical points and test whether they are local min or max. However, for the function above, I found many critical points that could all be classified as local minimum.
The answer only gives two of those points as local minimum.
Can anyone suggest what I do after i find many critical points that could all be local minimum?