Raphael Appenzeller

Raphael Appenzeller

I am a PhD-student at ETH Zürich under the supervision of Marc Burger.

Contact me:

I like geometry. I like to create and look at models of mathematical objects. I like to imagine living in four-dimensional space and/or the hyperbolic plane. My research is about things with negative curvature. In particular I look at connections between symmetric spaces and combinatorial objects called buildings.

- An incomplete real tree with complete segments [arXiv:2212.09640], joint with Luca De Rosa, Xenia Flamm, Victor Jaeck.
- (In)dependence of the axioms of Λ-trees [arXiv:2112.02704].

Here you can find my Bachelor Thesis on non-Archimedean hyperbolic planes and trees.

Do you like geometry, topology and groups? Check out the Geomtetry Graduate Colloquium at ETH.


Sometimes I like to create silly things. Here are some of them (very unpolished):