The Non-Autonomous Chiral Model and the Ernst Equation of General Relativity in the Bidifferential Calculus Framework

Aristophanes Dimakis, Nils Kanning, Folkert Müller-Hoissen

The non-autonomous chiral model equation for an $m\times m$ matrix function on a two-dimensional space appears in particular in general relativity, where for $m=2$ a certain reduc…