Hermann Weyl - One of the first people to combine general relativity with the laws of electromagnetism
Joao Magueijo - Theoretical physicist at Imperial College, who does not totally believe in Einstein's theories, especially the constant speed of light. Includes details about the author's views on the subject and courses being taught.
Karl Schwarzschild - A brief biography with reference to contemporary mathematicians and theories.
Karl Schwarzschild - The man who solved Einstein's equations and predicted the existence of black holes
Luigi Bianchi - A mathematician who developed many theorems regarding Riemannian geometry
Marcel Grossmann - A brief biography on Marcel Grossmann, a classmate of Einstein who was the first to find a connection between tensor calculus and the theory of relativity.
Willem DeSitter - Mathematician who studied solution to general relativity and developed DeSitter space