mathematically.

You can describe a perfect circle very very easily mathematically, a circle with infinitely fine grained curvature. But such a circle cannot exist in reality, because quantum space prohibit it.

I don't give a shit about mathematical descriptions of things that aren't real, math is insanely efficient at describing reality, but it would be equally efficient at describing ANY reality.

Also there are no ways that math within the confines of the standard model can describe faster than light travel. Because in reality it's not just light, it is causality of everything that has a maximum speed of light. The idea of for instance tachyons moving backwards in time is only a hypothesis, not a scientific theory. There is nothing that shows that tachyons should exist. But many things that shows us they don't. Breaking down causality for one, and the same is the case with faster than light travel, it breaks causality, and makes the universe a Picasso universe without rules. And clearly we do not live in a Picasso universe, because there are indeed rules we can rely on for science to work.