Affiliation:
1. Kent State University, Kent, OH 44240
2. Indiana University, Bloomington, IN 47405
Abstract
<p style='text-indent:20px;'>We establish an instantaneous smoothing property for decaying solutions on the half-line <inline-formula><tex-math id="M1">\begin{document}$ (0, +\infty) $\end{document}</tex-math></inline-formula> of certain degenerate Hilbert space-valued evolution equations arising in kinetic theory, including in particular the steady Boltzmann equation. Our results answer the two main open problems posed by Pogan and Zumbrun in their treatment of <inline-formula><tex-math id="M2">\begin{document}$ H^1 $\end{document}</tex-math></inline-formula> stable manifolds of such equations, showing that <inline-formula><tex-math id="M3">\begin{document}$ L^2_{loc} $\end{document}</tex-math></inline-formula> solutions that remain sufficiently small in <inline-formula><tex-math id="M4">\begin{document}$ L^\infty $\end{document}</tex-math></inline-formula> (i) decay exponentially, and (ii) are <inline-formula><tex-math id="M5">\begin{document}$ C^\infty $\end{document}</tex-math></inline-formula> for <inline-formula><tex-math id="M6">\begin{document}$ t>0 $\end{document}</tex-math></inline-formula>, hence lie eventually in the <inline-formula><tex-math id="M7">\begin{document}$ H^1 $\end{document}</tex-math></inline-formula> stable manifold constructed by Pogan and Zumbrun.</p>
Publisher
American Institute of Mathematical Sciences (AIMS)
Subject
Modeling and Simulation,Numerical Analysis
Reference12 articles.
1. G. Boillat, T. Ruggeri.On the shock structure problem for hyperbolic system of balance laws and convex entropy, Contin. Mech. Thermodyn., 10 (1998), 285-292.
2. J. B. Conway, A Course in Functional Analysis, 2nd edition, Graduate Texts in Mathematics, 96. Springer-Verlag, New York, 1990.
3. J. Diestel and J. J. Uhl, Vector Measures, Mathematical Surveys, No. 15. American Mathematical Society, Providence, R.I., 1977.
4. L. C. Evans, Partial Differential Equations, Graduate Studies in Mathematics, 19. American Mathematical Society, Providence, RI, 1998.
5. Y. Latushkin, A. Pogan.The dichotomy theorem for evolution bi-families, J. Diff. Eq., 245 (2008), 2267-2306.