Advances in Differential Equations

A priori estimates for nonlinear elliptic complexes

Tadeusz Iwaniec, Lucia Migliaccio, Gioconda Moscariello, and Antonia Passarelli di Napoli

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Abstract

We give a priori estimates for nonlinear partial differential equations in which the ellipticity bounds degenerate. The so-called distortion function which measures the degree of degeneracy of ellipticity is exponentially integrable, thus not necessarily bounded. The right spaces of the gradient of the solutions to such equations turn out to be the Orlicz-Zygmund spaces $L^p\log^\alpha L(\Omega)$. It is the first time the regularity results for genuine nonisotropic PDEs have been successfully treated. Recent advances in harmonic analysis, especially the ${\mathcal H }^{1}-BMO$ duality theory, play the key role in our arguments. Applications to the geometric function theory are already in place [16].

Article information

Source
Adv. Differential Equations Volume 8, Number 5 (2003), 513-546.

Dates
First available in Project Euclid: 19 December 2012

Permanent link to this document
https://projecteuclid.org/euclid.ade/1355926839

Mathematical Reviews number (MathSciNet)
MR1972489

Zentralblatt MATH identifier
1290.35074

Subjects
Primary: 35J45
Secondary: 30C65: Quasiconformal mappings in $R^n$ , other generalizations 35B45: A priori estimates 35J60: Nonlinear elliptic equations 35J70: Degenerate elliptic equations

Citation

Iwaniec, Tadeusz; Migliaccio, Lucia; Moscariello, Gioconda; Passarelli di Napoli, Antonia. A priori estimates for nonlinear elliptic complexes. Adv. Differential Equations 8 (2003), no. 5, 513--546. https://projecteuclid.org/euclid.ade/1355926839.


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