Black holes

Posts about black holes, a specific type of space-time in general relativity that contains regions from which signals cannot escape.

Can initial data for Einstein's equation be specified in such a way that all the 'energy' are kinetic and not potential?

We show that trapped surfaces cannot exist in (2+1) dimensional relativity.

The relationship between gravitational red shift and the surface gravity of black holes is explained.

My PhD Thesis on characterization and conditional uniqueness of the Kerr-Newman solution in general relativity.

Lecture notes on a fake derivation of the Kerr metric from the Schwarzschild metric, based on lots of hindsight.