HAWKING, Stephen, & PENROSE, Roland. ‘The singularities of gravitational collapse and cosmology’, in Proceedings of the Royal Society of London, series A, vol. 314. London: Royal Society, Dec. 1969-Jan. 70.

The first edition of the proof of the Hawking-Roland singularity theorem which posits that if the general theory of relativity describes the universe correctly, then there must have been a singularity at the beginning of time. Provenance: University College of Wales, Aberystwyth (stamps etc.). A near fine copy in library cloth preserving the publisher’s printed wrappers.