Reprint of a classical book. First published in 1950, and reprinted in 1954 and 1960, this lucid and profound exposition of Einstein's 1915 theory of gravitation is still essential reading.
This book defines Einstein's Theories on Gravitation in a mathematical manner, using partial differentiation and multiple integrals and matrices and other advanced things. It describes scalar densities and tensor densities, defining what they are and showing the symbols used to show it.
I didn't really understand this book, since I can't explain it well, but I did like it. I need to find a book or something that will teach me partial derivatives and stuff. Maybe then I can follow it.