2 problems

Consider sign-changing radial solutions of the semilinear elliptic problem with perturbation parameter $\beta$, in the regime $\beta\geq3/2$. Concentrating solutions are solution s…

The problem concerns sign-changing radial solutions of the semilinear elliptic equation studied in the paper, with perturbation $h(t)=t e^{|t|^{\beta}}$ and $\beta\in(0,2)$. In the…