Gustav Herglotz (2 February 1881, Wallern – 22 March 1953, Göttingen) was a German Bohemian mathematician. He is best known for his works on the theory of relativity and seismology.Herglotz studied Mathematics and Astronomy at the University of Vienna in 1899, and attended lectures by Ludwig Boltzmann. In this time of study, he had a friendship with his colleagues Paul Ehrenfest, Hans Hahn and Heinrich Tietze.