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  • Extremal solutions and strong relaxation for nonlinear multivalued systems with maximal monotone terms
    Papageorgiou, Nikolaos, 1958- ; Vetro, Calogero ; Vetro, Francesca
    We consider differential systems in ▫$\mathbb{R}^N$▫ driven by a nonlinear nonhomogeneous second order differential operator, a maximal monotone term and a multivalued perturbation ▫$F(t, u, u')$▫. ... For periodic systems we prove the existence of extremal trajectories, that is solutions of the system in which ▫$F(t, u, u')$▫ is replaced by ▫$\text{ext}F(t, u, u')$▫ (= the extreme points of ▫$F(t, u, u')$)▫. For Dirichlet systems we show that the extremal trajectories approximate the solutions of the "convex" problem in the ▫$C^1(T, \mathbb{R}^N)$▫-norm (strong relaxation).
    Source: Journal of mathematical analysis and applications. - ISSN 0022-247X (Vol. 461, iss. 1, May 2018, str. 401-421)
    Type of material - article, component part ; adult, serious
    Publish date - 2018
    Language - english
    COBISS.SI-ID - 18280793