2 problems

Metric regularity conjecture. The metric regularity condition in Eq. $$ need not be assumed: it should follow from the regularity of the Weyl curvature in combination with a suitab…

Let $u$ be retarded time along future null infinity $\mathcal I^+$, and let $\Psi^{[4]}$ denote the relevant Newman--Penrose component of a linearised gravitational perturbation. A…