Recent content by afs

I just got one insight for this question, please report me if I am wrong. Spherically symmetric spacetimes possesses a smooth two-parameter group of isometries, and a single vector can be transformed in any other, "rotated" one. As this smooth-parametrized isometries leave the null directions...

Hi, I've been reading about Petrov classification and I have a question (in fact this is an exercise from Wald's General Relativity): How can we prove that spherically symmetric spacetimes are algebraically special, using the fact that the Weyl tensor, as the principal null directions are...