José Natário holds a DPhil in Mathematical Sciences (2000) from the University of Oxford, England. He has been an Associate Professor of Mathematics at Instituto Superior Técnico (University of Lisbon, Portugal) since 2010, where he teaches a course in Mathematical Relativity to Master and Doctorate students in Mathematics and Physics. He authored ""General Relativity Without Calculus"" (2011, ISBN 978-3-642-21451-6) and co-authored ""An Introduction to Riemannian Geometry"" (2014, ISBN 978-3-319-08665-1), both published by Springer.
“This is a well-organized book that provides advanced students with the appropriate background a comfortable first introduction to important mathematical results of general relativity. … The instructive reading will certainly motivate many students to subsequently expand their scope even further, both thematically and methodologically.” (Wolfgang Hasse, Mathematical Reviews, April, 2022)