Functors in Lorentzian geometry -- three variations on a theme
arXiv:2205.01617 · doi:10.1007/s10714-023-03087-7
Abstract
We review three examples of functors from Lorentzian categories and their applications in finiteness results, singularity theorems and boundary constructions. The third example is a novel functor from the category of ordered measure spaces to the category of Lorentzian pre-length spaces in the sense of Kunzinger-Sämann.
15 pages. The article is a contribution to the conference volume of the conference "Singularity theorems, causality and all that; a tribute to Roger Penrose" (2021) and is in large parts an overview article but also contains some new results