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Where is the Hessian? Eh?I mean, do you think I join a monastary for anything other than the feelof course sack-cloth chaffing me as I go about my daily routines in my habit?
I've never seen a Hessian in the monastery. Although, if someone asked about identifying local maxima of functions with several variables, it's possible that the matrix
∂2f/∂x1∂x1 ... ∂2f/∂x1∂xn
... ... ... ...
∂2f/∂xn∂x1 ... ∂2f/∂xn∂xn
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