Abstract
This paper is concerned with the existence and stability of traveling waves for doubly degenerate diffusion equations, where the spatial diffusion operator is of the form \(\partial _x(|\partial _x u^m|^{p-2}\partial _x u^m)\) with \(m>0\) and \(p>1\). It is proved that, for the slow diffusion case \(m(p-1)>1\), there exists a minimum wave speed \(c^*\), such that the problem admits smooth traveling waves when wave speed \(c>c^*\) and semi-finite traveling waves with critical wave speed \(c=c^*\) while, for the fast diffusion case \(0<m(p-1)<1\), there is no nonnegative traveling wave solution. By the weighted energy method, we also show the \(L^1\)-stability of the traveling waves.
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Acknowledgements
The research of R. Huang was supported by NSFC Grant Nos. 11971179 and 12126204, GBABRF Grant Nos. 2020A1515010337, 2020B1515310005 and 2020B1515310013.
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Huang, R., Liang, Z. & Wang, Z. Existence and stability of traveling waves for doubly degenerate diffusion equations. Z. Angew. Math. Phys. 74, 41 (2023). https://doi.org/10.1007/s00033-023-01938-6
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DOI: https://doi.org/10.1007/s00033-023-01938-6