Global existence of solutions to the fully parabolic chemotaxis system with logistic source under nonlinear Neumann boundary conditions

We study the existence of global boundedness solutions to the fully parabolic chemotaxis systems with logistic sources, $ru- \mu u^2$, under nonlinear Neumann boundary conditions, $\frac{\partial u}{\partial \nu }= |u|^p$ where $p >1$ in smooth bounded domain $\Omega \subset \mathbb{R}^n$ with $n \geq 2$. A recent study by Le (2023) has shown that the logistic sources can ensure that solutions are global and bounded when $n =2$ with $p < \frac{3}{2}$ and $n=3$ with $p <\frac{7}{5}$. In this paper, we extend the previous findings by demonstrating the existence of global bounded solutions when $p< \frac{3}{2}$ in any spatial dimension $n \geq 2$.