Vranceanu G., Rosça R. Introduction in Relativity and Pseudo-Riemannian Geometry

Academiei Republicii Socialiste Romania, 1976. — 216 p.The idea of this book was born in a discussion that I had with my colleague Radu Rosca at the University of Louvain in July 1974, when we met in a short vacation.
To my opinion the theory of relativity has created a mathematical theory, which can be understood only by highly specialised mathematicians. However I believe that there are many people who intend to get familiar with this field without a high theoretical training. In other words it seems to be convenient to consider the theory of relativity using the most simple mathematical apparatus, the Euclidean or Riemannian and pseudo-Euclidean and pseudo-Riemannian spaces tackled by the classical analysis, and when necessary, some new apparatus, to explain this carefully.