Computing trisections of 4-manifolds.

Bell, Mark; Hass, Joel; Rubinstein, Joachim Hyam; Tillmann, Stephan · Proc Natl Acad Sci U S A · 2018

basic_science · Level V

Where this comes from

Abstract

We describe an algorithm to compute trisections of orientable four-manifolds using arbitrary triangulations as input. This results in explicit complexity bounds for the trisection genus of a 4-manifold in terms of the number of pentachora (4-simplices) in a triangulation.