Abstract
We devise Lyapunov functionals and prove uniform L 1 stability for one-dimensional semilinear hyperbolic systems with quadratic nonlinear source terms. These systems encompass a class of discrete velocity models for the Boltzmann equation. The Lyapunov functional is equivalent to the L 1 distance between two weak solutions and non-increasing in time. They result from computations of two point interactions in the phase space. For certain models with only transversal collisional terms there exist generalizations for three and multi-point interactions.
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J.L. Lebowitz
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Ha, SY., Tzavaras, A. Lyapunov Functionals and L 1-Stability for Discrete Velocity Boltzmann Equations. Commun. Math. Phys. 239, 65–92 (2003). https://doi.org/10.1007/s00220-003-0866-9
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DOI: https://doi.org/10.1007/s00220-003-0866-9