His scientific works include a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity , and the theoretical prediction that black holes emit radiation , often called Hawking radiation .
[ 16 ] [ 17 ] His scientific works include a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity , and the theoretical prediction that black holes emit radiation , often called Hawking radiation .