Growing solutions of the fractional p-Laplacian equation in the Fast Diffusion range
We establish existence, uniqueness as well as quantitative estimates for solutions u(t,x) to the fractional nonlinear diffusion equation, ∂tu+Ls,p(u) = 0, where Ls,p= (−Δ)sp is the standard fractional p-Laplacian operator. We work in the range of exponents 0 < s < 1 and 1 < p < 2, and in...
| Autor: | |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/700583 |
| Acceso en línea: | http://hdl.handle.net/10486/700583 https://dx.doi.org/10.1016/j.na.2021.112575 |
| Access Level: | acceso abierto |
| Palabra clave: | Extinction Fractional operators Nonlinear parabolic equations p-Laplacian operator Self-similar solutions Solutions with growing data Matemáticas |
| Sumario: | We establish existence, uniqueness as well as quantitative estimates for solutions u(t,x) to the fractional nonlinear diffusion equation, ∂tu+Ls,p(u) = 0, where Ls,p= (−Δ)sp is the standard fractional p-Laplacian operator. We work in the range of exponents 0 < s < 1 and 1 < p < 2, and in some sections we need sp <1. The equation is posed in the whole space x ∈ RN. We first obtain weighted global integral estimates that allow establishing the existence of solutions for a class of large data that is proved to be roughly optimal. We use the estimates to study the class of self-similar solutions of forward type, that we describe in detail when they exist. We also explain what happens when possible self-similar solutions do not exist. We establish the dichotomy positivity versus extinction for nonnegative solutions at any given time. We analyse the conditions for extinction in finite time |
|---|