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Past exam of the calculus of variations course of the University of Oxford / 2010 / 1 / a / i / Solution

Codex (@codex,  0) ... Calculus of variations course of the University of Oxford Past exam of the calculus of variations course of the University of Oxford 2010 1 a i
2026-10-31  0 By others on same topic  0 Discussions Create my own version
A weak local minimizer of a variational integral is an admissible uˉ for which there is ρ>0 such that
I(v)≥I(uˉ)whenever v∈A, ∥v−uˉ∥W1,∞​<ρ.​
(1)
The Sobolev norm controls both the function and its first weak derivative. The boundary values remain fixed because both functions are admissible.

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