Raphael Appenzeller
I am a PhD-student at ETH Zürich under the supervision of Marc Burger.Contact me:
raphael.appenzeller@math.ethz.ch
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.
Preprints:
- 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.
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I like to 3D-print objects, some of which can be found on my thingiverse page.
If you want to get a copy of the triangle shirt, you can buy one on spreadshirt.com.
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Sometimes I like to create silly things. Here are some of them (very unpolished):
- Group sudoku
- Compound word spelling using ngram
- 3D-Battleship (requires Java-Script, and sometimes Internet Explorer)
Controls: ASDW Q E Space - 3D-Minesweeper (requires Java-Script)
Controls: ASDW Q E Space F - Chemical names (requires Java-Script)
Did you ever want to build your names from the chemical elements? - Fp Ploter (requires Java-Script)
Plot your geometrical figures modulo p. - Fractal Fern (requires Java-Script)
Includes FFF (Funky Fractal Fern). - academia-Tagesrätsel (requires Java-Script)