 José M. Martín Senovilla

A physicist working on the mathematical structure of general relativity. His review with David Garfinkle explains why the Penrose singularity theorem changed the understanding of gravitational collapse: a trapped surface, together with the theorem’s causal and energy assumptions, forces geodesic incompleteness. The conclusion does not depend on choosing an exactly spherical model of a collapsing star. Their account distinguishes the theorem’s precise mathematical conclusion from an informal claim that a particular curvature quantity must diverge.^[ref]