Page 1 Next

Displaying 1 – 20 of 38

Showing per page

Quasiconvexity at the boundary and concentration effects generated by gradients

Martin Kružík (2013)

ESAIM: Control, Optimisation and Calculus of Variations

We characterize generalized Young measures, the so-called DiPerna–Majda measures which are generated by sequences of gradients. In particular, we precisely describe these measures at the boundary of the domain in the case of the compactification of ℝm × n by the sphere. We show that this characterization is closely related to the notion of quasiconvexity at the boundary introduced by Ball and Marsden [J.M. Ball and J. Marsden, Arch. Ration. Mech. Anal. 86 (1984) 251–277]. As a consequence we get...

Quasilinear elliptic equations with discontinuous coefficients

Lucio Boccardo, Giuseppe Buttazzo (1988)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

We prove an existence result for equations of the form { - D i ( a i j ( x , u ) D j u ) = f in Ω u H 0 1 ( Ω ) . where the coefficients a i j ( x , s ) satisfy the usual ellipticity conditions and hypotheses weaker than the continuity with respect to the variable s . Moreover, we give a counterexample which shows that the problem above may have no solution if the coefficients a i j ( x , s ) are supposed only Borel functions

Quasi-minima

Mariano Giaquinta, Enrico Giusti (1984)

Annales de l'I.H.P. Analyse non linéaire

Currently displaying 1 – 20 of 38

Page 1 Next