Stability of solutions for a parabolic problem involving fractional p-Laplacian with logarithmic nonlinearity (2006.11178v1)

Abstract: In this paper, we study the following Dirichlet problem for a parabolic equation involving fractional $p$-Laplacian with logarithmic nonlinearity \begin{equation*}\label{eq}\left{ \begin{array}{llc} u_{t}+(-\Delta)^{s}_{p}u+|u|^{p-2}u=|u|^{p-2}u\log(|u|) & \text{in}\ & \Omega,\;t>0 , u =0 & \text{in} & \mathbb{R}^{N}\backslash \Omega,\;t > 0, u(x,0)=u_{0}(x), & \text{in} &\Omega , \end{array}\right. \end{equation*} where $\Omega \subset \mathbb{R}^N \, ( N\geq 1)$ is a bounded domain with Lipschitz boundary and $2\leq p< \infty$. The local existence will be done by using the Galerkin approximations. By combining the potential well theory with the Nehari manifold we establish the existence of global solutions. Then, by virtue of a differential inequality technique, we prove that the local solutions blow-up in finite time with arbitrary negative initial energy and suitable initial values. Moreover, we give decay estimates of global solutions. The main difficulty here is the lack of logarithmic Sobolev inequality concerning fractional $p$-Laplacian.