Non-convex problems in calculus of variations
Calculus of variations
Article REF: AF111 V1
Non-convex problems in calculus of variations
Calculus of variations

Author : Bernard DACOROGNA

Publication date: October 10, 2007 | Lire en français

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5. Non-convex problems in calculus of variations

We will now discuss the case where the function f is not convex (in the scalar case n = 1) or not quasi-convex (in the vector case n2 ). Non-convex problems are often encountered in questions related to phase transitions, and we'll give several examples motivated by applications to such problems. The rule, of course, is that :

(P)inf{I(u)=Ωf(x,
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