Essential Relativity

Wolfgang Rindler (18 May 1924 – 8 February 2019) was an Austrian physicist studying general relativity. He is known for introducing the term "event horizon" for the boundary of a black hole, Rindler coordinates, and (in collaboration with Roger Penrose) for the use of spinors in general relativity. An honorary member of the Austrian Academy of Sciences and foreign member of the Accademia delle Scienze di Torino, he was also a prolific textbook author.