Christiane Tretter (born 28 December 1964)[1] is a German mathematician and mathematical physicist who works as a professor in the Mathematical Institute (MAI) of the University of Bern in Switzerland, and as managing director of the institute.

[2] Her research interests include differential operators and spectral theory.

Tretter studied mathematics, with a minor in physics, at the University of Regensburg, earning a diploma in 1989, a Ph.D. in 1992, and a habilitation in 1998.

[1] Her doctoral dissertation, Asymptotische Randbedingungen für Entwicklungssätze bei Randeigenwertproblemen zu

Tretter won the Richard von Mises Prize of the Gesellschaft für Angewandte Mathematik und Mechanik in 1995.