I am doing some numerics where I found the minimal value of a functional that does not satisfy the Euler-Lagrange equation associated. I think I am dealing with a minimal value that is not a local extremum. Can someone indicate a textbook or article that introduces the reader to the difficulties involving global minima in calculus of variations? Thanks in advance.
2026-03-25 11:08:53.1774436933
Texts about global minima in functionals
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