General Relativity (GR), proposed by Albert Einstein in 1915, revolutionized our understanding of gravity, space, and time. The theory describes gravity as the curvature of spacetime caused by the presence of mass and energy. While GR has been extensively experimentally verified and has become a cornerstone of modern astrophysics and cosmology, its mathematical and conceptual foundations can be daunting for many students and researchers. This essay aims to provide an overview of the theoretical minimum required to understand General Relativity, focusing on the fundamental concepts and mathematical framework.
: Explaining how objects move along the "straightest possible paths" in a curved environment. the theoretical minimum general relativity pdf upd