Blowup of sign-changing radial solutions for a semilinear parabolic equation
Blowup of sign-changing radial solutions for a semilinear parabolic equation
This paper is concerned with sign-changing radial solutions of the semilinear parabolic equation $$\left\{ \begin{gathered} u_t-u_{rr}-\frac{N-1}{r}u_r=a(r)u+|u|^{p - 1}u, \ \ \ \ r\in(0,1), t>0, \hfill \\ u_r(0,t)=0, \ \ \ \ \ \ \ \ \ \ \ \ u(1,t)=0, \ \ \ \ \ \ \ \ \ \ …