On a necessary condition for removing singularities of solutions of nonlinear elliptic inequalities

A. A. Kon'kov, A. E. Shishkov

We study solutions of the differential inequality $$ Δ^{m / 2} u \ge f (x) g (u) \quad \mbox{in } B_1 \setminus \{ 0 \}, $$ where $m\ge 2$ is an even integer, $f$ and $g$ are some…