On Aug 23, 9:52*pm, "M.M.M." wrote:
This is I have heard the deepest problem in cosomology. What is it?
Musatov

In Cosmology, a singularity is a point where the geodesics cannot be
extended smoothly over said point. This is slightly different then
the traditional statement that a singularity is a region of spacetime
where the curvature becomes infinite independent of the frame of
reference.