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

We study solutions of the differential inequality $${\mathrm{\Delta }}^{m\mathrm{/}2}u\ge f(x)g(u)in{B}_1\setminus \{0\},$$ where $m\ge 2$ is an even integer, $f$ and $g$ are some functions, and $B_1$ is an open unit ball in $R^n$, $n\ge 2$, centered at zero. Our aim is to obtain a necessary condition for a singularity at zero to be removable for any solution of this inequality.