Weak-Strong Uniqueness for Maxwell--Stefan Systems

Xiaokai Huo, Ansgar Jüngel, Athanasios Tzavaras

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The weak-strong uniqueness for Maxwell--Stefan systems and some generalized systems is proved. The corresponding parabolic cross-diffusion equations are considered in a bounded domain with no-flux boundary conditions. The key points of the proofs are various inequalities for the relative entropy associated with the systems and the analysis of the spectrum of a quadratic form capturing the frictional dissipation. The latter task is complicated by the singular nature of the diffusion matrix. This difficulty is addressed by proving its positive definiteness on a subspace and using the Bott--Duffin matrix inverse. The generalized Maxwell--Stefan systems are shown to cover several known cross-diffusion systems for the description of tumor growth and physical vapor deposition processes.
Original languageEnglish (US)
Pages (from-to)3215-3252
Number of pages38
JournalSIAM Journal on Mathematical Analysis
Issue number3
StatePublished - May 26 2022

ASJC Scopus subject areas

  • Computational Mathematics
  • Analysis
  • Applied Mathematics


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