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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

A review of recent applications of the relative entropy method to discontinuous solutions of conservation laws


Author: Alexis F. Vasseur
Journal: Quart. Appl. Math. 81 (2023), 553-565
MSC (2020): Primary 35L65; Secondary 76N15, 35L45, 35B35
DOI: https://doi.org/10.1090/qam/1667
Published electronically: April 26, 2023
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Abstract: Dafermos [Arch. Rational Mech. Anal. 70 (1979), pp. 167–179] proved the weak/strong principle for conservation laws. It states that Lipschitz solutions to conservation laws endowed with convex entropies are unique and stable among weak solutions. The method, based on relative entropy, was extended by Di Perna [Indiana Univ. Math. J. 28 (1979), pp. 137–188] to show the uniqueness of shocks among weak solutions with strong traces. This theory has been recently revisited with the notion of weighted contractions up to shifts. We review in this paper recent applications of this method, including the weak/BV principle and the stability of discontinuous solutions among inviscid double limits of Navier-Stokes systems.


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Additional Information

Alexis F. Vasseur
Affiliation: Department of Mathematics, The University of Texas at Austin, Austin, Texas 78712
MR Author ID: 642986
ORCID: 0000-0002-0672-0581
Email: vasseur@math.utexas.edu

Keywords: Compressible Euler system, shocks, discontinuous solutions, uniqueness, stability, relative entropy, conservation laws, weighted contraction with shifts
Received by editor(s): February 22, 2023
Published electronically: April 26, 2023
Additional Notes: The author was partially supported by the NSF grants DMS 1907981 and DMS 2219434.
Dedicated: Dedicated to my dear friend Constantine M. Dafermos
Article copyright: © Copyright 2023 Brown University