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Uniqueness of differential
Posted:
Feb 22, 2008 11:40 AM


Sorry if this is off topic.
Can anybody suggest a proper place to ask the following question: how to demonstrate the uniqueness of the differential of a function? Given a function f, its differential in P_0 is a linear map L such that
lim f(P)  f(P_0)  L(P_0  P) P>P_0  = 0 P_0  P
Thanks for any indication Rodolfo



