Gravity with a Twist

A theory of gravity which describes spacetime in terms of non-Riemannian geometry is presented and studied. This Nonsymrnetric Gravity Theory (NGT) is a close relative of Einstein's general relativity, differing only fry a fundamental torsion or twist in the spacetime structure. The principal aim of the study is to investigate the existence, or otherwise, of black holes in NGT. Along the way many issues have to be addressed including the physical description of spacetime geometry and the interaction of gravity with matter. At least a partial revolution of these issue's is offered. In places results will be presented in a historical fashion, reflecting the evolution of ideas that occurred as the study progressed. The definitive result of the study is to show that there will be no Schwarzschild-type black holes in spacetimes with torsion.Ph.D