Woolgar, E.

1. A Positive Mass Theorem Based on the Focusing and Retardation of Null Geodesics
   1993/01/14 by Roger Penrose, R. Penrose, Penrose, R. +5 · 1 voice · 6 citations
   Mathematics · Physics and Astronomy · #Advanced Mathematical Theories and Applications #Mathematics and Applications #Relativity and Gravitational Theory #gr-qc #hep-th