Precis of General Relativity
arXiv:gr-qc/9508043
Abstract
Omitting the motivations and historical connections, and also the detailed calculations, I state succinctly the principles that determine the relativistic idealization of a GPS system. These determine the results that Ashby presents in his tutorial.
LaTeX, 5 pages plus one uuencoded ps figure; notes of remarks given at a workshop on GPS (Global Positioning System)