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Email: thevis [at]
Phone: +49681/302-3056
Address: Mathematik und Informatik
Gebäude E.2.4 - Raum: 403
Universität des Saarlandes
66123 Saarbrücken (Germany)



This website will no longer be updated. Please visit my new website.

I recently finished my PhD which was supervised by Gabriela Weitze-Schmithüsen (Saarland University) and Alice Niemeyer (RWTH Aachen). My PhD thesis is available here. The project was funded by the SFB-TRR 195 Symbolic Tools in Mathematics and their Application. I was a member of the Integrated Research Training Group of the SFB-TRR 195 and a scholar of the German Academic Scholarship Foundation. Since April 2022 I have been a postdoctoral researcher at Goethe University Frankfurt.

My primary research interests are in geometry and group theory. During my PhD, I liked thinking about questions that connect a geometric setting with group theory. I mainly worked with translation surfaces (in particular square-tiled surfaces) and \(p\)-groups.



  • Veech Groups and Sums of Lyapunov Exponents of \(2\)-Origamis (in preparation)
  • Regular origamis with totally non-congruence groups as Veech groups, Proceedings of the 3rd BYMAT Conference 2020, [arXiv]
  • Strata of \(p\)-Origamis (with Johannes Flake, 2020), Mathematische Nachrichten (in press), [arXiv]

Talks and Poster Presentations




Saarland University:

  • Winter 2018/19: Lineare Algebra I (Teaching Assistant of Prof. Gabriela Weitze-Schmithüsen)

RWTH Aachen:

  • Winter 2021/22: Hands-on Workshop Analysis and Linear Algebra
  • Summer 2021: Begleitpraktikum II
  • Winter 2020/21: Lineare Algebra I (Teaching Assistant of Prof. Alice Niemeyer)
  • Winter 2015/16: Analysis I (Teaching Assistant of Prof. Sebastian Walcher)
  • Summer 2014: Stochastics I (Teaching Assistant of Prof. Maria Kateri)


I helped organizing various annual outreach events for high school students at Saarland University:

  • competition "Tag der Mathematik",
  • workshop during the UniCamp,
  • stand of the math department at the Open House.

As a mentor in the program MentoMINT, I supported female high school students interested in math and sciences when choosing their field of study after high school.