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An Introduction To Viscosity Solutions for Fully Nonlinear PDE with Applications to Calculus of Variations in L

An Introduction To Viscosity Solutions for Fully Nonlinear PDE with Applications to Calculus of Variations in L By Nikos Katzourakis
2015 | 136 Pages | ISBN: 3319128280 | PDF | 4 MB

The purpose of this book is to give a quick and elementary, yet rigorous, presentation of the rudiments of the so-called theory of Viscosity Solutions which applies to fully nonlinear 1st and 2nd order Partial Differential Equations (PDE). For such equations, particularly for 2nd order ones, solutions generally are non-smooth and standard approaches in order to define a "weak solution" do not apply: classical, strong almost everywhere, weak, measure-valued and distributional solutions either do not exist or may not even be defined. The main reason for the latter failure is that, the standard idea of using "integration-by-parts" in order to pass derivatives to smooth test functions by duality, is not available for non-divergence structure PDE.

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Tags: Introduction, Viscosity, Solutions, Nonlinear, Applications, Calculus, Variations

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