# Optimal estimate of the life span of solutions to the heat equation with a nonlinear boundary condition

25 Feb 2020 Hisa Kotaro

Consider the heat equation with a nonlinear boundary condition $$\partial_t u=\Delta u,\quad x\in{\bf R}^N_+,\,\,\,t>0,\qquad \partial_\nu u=u^p, \quad x\in\partial{\bf R}^N_+,\,\,\,t>0,\qquad u(x,0)=\kappa\psi(x),\quad x\in D:=\overline{{\bf R}^N_+},$$ where $N\ge 1$, $p>1$, $\kappa>0$ and $\psi$ is a nonnegative measurable function in ${\bf R}^N_+ :=\{y\in{\bf R}^N:y_N>0 \}$. Let us denote by $T(\kappa\psi)$ the life span of solutions to this problem... (read more)

PDF Abstract

# Code Add Remove Mark official

No code implementations yet. Submit your code now

# Categories

• ANALYSIS OF PDES