Abstract
We prove an abstract existence theorem for the minimum of the functional
where the mappingG(y) is concave and the functionh(x, u) is nonconvex inu, under constraints of inequality type imposed on solutions of systems described by linear elliptic operators. This theorem is further specified for some problems in calculus of variations and optimal control theory.
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Translated fromMatematicheskie Zametki, Vol. 65, No. 1, pp. 130–142, January, 1999.
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Tolstonogov, D.A. Minima in elliptic variational problems without convexity assumptions. Math Notes 65, 109–119 (1999). https://doi.org/10.1007/BF02675015
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DOI: https://doi.org/10.1007/BF02675015