Traveling waves and weak solutions for an equation with degenerate dispersion
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- by David M. Ambrose and J. Douglas Wright PDF
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Abstract:
We consider the following family of equations: \begin{equation*} u_t = 2 u u_{xxx} - u_x u_{xx} + 2 k u u_x. \end{equation*} Here $k \ne 0$ is a constant and $x \in [-L_0,L_0]$. We demonstrate that for these equations there are compactly supported traveling wave solutions (which are in $H^2$), and the Cauchy problem (with $H^2$ initial data) possesses a weak solution which exists locally in time. These are the first degenerate dispersive evolution PDE where both of these features are known to hold simultaneously. Moreover, if $k < 0$ or $L_0$ is not too large, the solution exists globally in time.References
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Additional Information
- David M. Ambrose
- Affiliation: Department of Mathematics, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104
- MR Author ID: 720777
- Email: ambrose@math.drexel.edu
- J. Douglas Wright
- Affiliation: Department of Mathematics, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104
- MR Author ID: 712674
- Email: jdoug@math.drexel.edu
- Received by editor(s): January 9, 2012
- Published electronically: July 11, 2013
- Communicated by: James E. Colliander
- © Copyright 2013
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication. - Journal: Proc. Amer. Math. Soc. 141 (2013), 3825-3838
- MSC (2010): Primary 35Q53
- DOI: https://doi.org/10.1090/S0002-9939-2013-12070-8
- MathSciNet review: 3091772