# American Institute of Mathematical Sciences

doi: 10.3934/mcrf.2019032

## A moment approach for entropy solutions to nonlinear hyperbolic PDEs

 1 CNRS, LAAS, Université de Toulouse, 7 avenue du colonel Roche, F-31400 Toulouse, France 2 Applied Mathematics and Plasma Physics Group and Center for Nonlinear Studies, Theoretical Division, Los Alamos National Laboratory, NM 87545 Los Alamos, USA 3 Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 4, CZ-16206 Prague, Czechia 4 Institute of Mathematics of Toulouse (IMT), Université Paul Sabatier, 118 Route de Narbonne, F-31400, Toulouse, France

* Corresponding author: Swann Marx

Received  July 2018 Revised  February 2019 Published  April 2019

Fund Project: This work was partly funded by the ERC Advanced Grant Taming and by project 16-19526S of the Grant Agency of the Czech Republic. Part of the research of the second author was also supported by the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project numbers 20180468ER and 20170508DR

We propose to solve hyperbolic partial differential equations (PDEs) with polynomial flux using a convex optimization strategy.This approach is based on a very weak notion of solution of the nonlinear equation,namely the measure-valued (mv) solution,satisfying a linear equation in the space of Borel measures.The aim of this paper is,first,to provide the conditions that ensure the equivalence between the two formulations and,second,to introduce a method which approximates the infinite-dimensional linear problem by a hierarchy of convex,finite-dimensional,semidefinite programming problems.This result is then illustrated on the celebrated Burgers equation.We also compare our results with an existing numerical scheme,namely the Godunov scheme.

Citation: Swann Marx, Tillmann Weisser, Didier Henrion, Jean Bernard Lasserre. A moment approach for entropy solutions to nonlinear hyperbolic PDEs. Mathematical Control & Related Fields, doi: 10.3934/mcrf.2019032
##### References:

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##### References:
Approximation of the solution $y(t,x)$ obtained with our GMP approach, in the case of a shock
Approximation of the solution $y(t,x)$ obtained with our GMP approach, in the case of a rarefaction wave
Approximation of $y(0.75,x)$ with Godunov and GMP
 $x$ 0.185 0.1855 0.186 0.1865 0.187 0.1875 0.188 0.1885 Godunov 0.9999 0.9991 0.9936 0.958 0.7647 0.2724 0.0123 0 GMP 1 1 1 1 1 0 0 0
 $x$ 0.185 0.1855 0.186 0.1865 0.187 0.1875 0.188 0.1885 Godunov 0.9999 0.9991 0.9936 0.958 0.7647 0.2724 0.0123 0 GMP 1 1 1 1 1 0 0 0
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