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C 1 , α regularity for elliptic equations with the general nonstandard growth conditions

Sungchol Kim, Dukman Ri (2024)

Mathematica Bohemica

We study elliptic equations with the general nonstandard growth conditions involving Lebesgue measurable functions on Ω . We prove the global C 1 , α regularity of bounded weak solutions of these equations with the Dirichlet boundary condition. Our results generalize the C 1 , α regularity results for the elliptic equations in divergence form not only in the variable exponent case but also in the constant exponent case.

Caccioppoli estimates and very weak solutions of elliptic equations

Tadeusz Iwaniec, Carlo Sbordone (2003)

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

Caccioppoli estimates are instrumental in virtually all analytic aspects of the theory of partial differential equations, linear and nonlinear. And there is always something new to add to these estimates. We emphasize the fundamental role of the natural domain of definition of a given differential operator and the associated weak solutions. However, we depart from this usual setting (energy estimates) and move into the realm of the so-called very weak solutions where important new applications lie....

Calcul exponentiel des opérateurs microdifférentiels d'ordre infini. II

Takashi Aoki (1986)

Annales de l'institut Fourier

Soit P un opérateur pseudodifférentiel (ou microdifférentiel) tel que exp P soit aussi un opérateur pseudodifférentiel. Alors le symbole de exp P s’ecrit exp q avec un symbole q . Pour la réciproque, si Q est un opérateur à symbole exp q , il existe un opérateur P tel que Q = exp P . Tous ces résultats reposent sur la théorie développée dans la Note I de cette série. Comme application, on obtient une condition suffisante d’inversibilité pour les opérateurs pseudodifférentiels d’ordre infini.

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