Friederich Ignaz Mautner (14 May 1921–2002)[1] was an Austrian-American mathematician, known for his research on the representation theory of groups, functional analysis, and differential geometry.
[2] Following the Anschluss in 1938, Mautner, a Jew, emigrated from Austria to the UK where he became one of the thousands or refugees who were interred by the British and shipped off to Hay Camp 7 in Australia.
[4] He then moved to the USA, where he was a visiting scholar[5] at the Institute for Advanced Study (IAS) in Princeton (1946-47).
[8] Working in the fields of ergodic theory of geodesic flows, he published a paper in 1957 that established the lemma and the phenomenon that bear his name.
[9] He published a ground-breaking paper in 1958 that established him as a pioneer in the representation theory of reducible p-adic groups.