Generalised solutions for fully nonlinear PDE systems and existence-uniqueness theorems

Katzourakis, N. (2017) Generalised solutions for fully nonlinear PDE systems and existence-uniqueness theorems. Journal of Differential Equations, 263 (1). pp. 641-686. ISSN 0022-0396 doi: 10.1016/j.jde.2017.02.048

Abstract/Summary

We introduce a new theory of generalised solutions which applies to fully nonlinear PDE systems of any order and allows for merely measurable maps as solutions. This approach bypasses the standard problems arising by the application of Distributions to PDEs and is not based on either integration by parts or on the maximum principle. Instead, our starting point builds on the probabilistic representation of derivatives via limits of difference quotients in the Young measures over a toric compactification of the space of jets. After developing some basic theory, as a first application we consider the Dirichlet problem and we prove existence–uniqueness–partial regularity of solutions to fully nonlinear degenerate elliptic 2nd order systems and also existence of solutions to the ∞-Laplace system of vectorial Calculus of Variations in L∞.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/69305
Identification Number/DOI	10.1016/j.jde.2017.02.048
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
Publisher	Elsevier
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