Black holes have large gravity so it has to do with 1/r^2. When r->0 we have a singularity problem. That problem has to do with chaos. Then there is a known limit for x/sin(x)=1,x->0. Replace 1/r² with f() then the secret of the black hole is how r goes to zero with inf. safety.

Black holes have large gravity so it has to do with 1/r^2. When r->0 we have a singularity problem. That problem has to do with chaos. Then there is a known limit for x/sin(x)=1,x->0. Replace 1/r² with f() then the secret of the black hole is how r goes to zero with inf. safety.