Moreover, it incorporates some of the most difficult features of more complex models. Like all black holes, the Schwarzschild black hole has at its center a singularity , a region of infinite density and spacetime curvature. And, again like all other black holes, the Schwarzschild black hole has a boundary called an event horizon . Numerical relativists continue to test new ideas and techniques on the Schwarzschild model before transferring them to more complex models. A real cow is too complicated, as is a real black hole.
Physicists often resort to assumptions that simplify a problem, making it solvable.
Clearly, computation of black hole spacetimes must be extended beyond simple spherical symmetry.