- Why is this page on GitHub? Read this

- CV 2022
- I am principal investigator ToFu
- I am an associate member of GEAR
- I was
**director**of the GDR des Tresses - I organised a special session
**AMS-EMS-SMF**Joint International Meeting in July.

Geometry of surfaces and its relations with number theory here are some preprints.

- Eisenstein integers and equilateral ideal triangles
- Geometry of Fermat’s sum of squares
- Convexity and Aigner’s Conjectures
- On systoles and ortho spectrum rigidity

- newton fractals
- back on Copilot
- thinking about projects like magic squares

```
# compare with
# https://scipython.com/book/chapter-6-numpy/examples/creating-a-magic-square/
# which is (nearly) twice as long :(
def mk_magic_square(N=5,
RANDOM=False):
seed_row = (N+1) * np.arange(0, N) + 1
seed_row = np.roll(seed_row, N // 2)
ms = np.zeros((N,N), dtype=int)
for k in range(0,N):
ms[k] = np.roll(seed_row, -k) + k * N
ms = ms % N**2
ms[ms == 0] = N**2
if RANDOM :
V = np.identity(N, dtype=int)
np.random.shuffle(V)
ms = V @ ms
return ms
```

- Wednesdays 15h15, Thursday 8h
- web page for class

- Tuesdays 8:00 Wednesdays 9:45
- web page for class

- Fridays 13:45
- page for the class

Evaluation is by project. Here are some of the finished projects from 2020 and 2021:

Video of a 120-cell by Muaad Tamtam et Damis El Alami.

And this is something I learned to do by talking to the students (and going on forums).

- the particles follow a random walk.
- the yellow particles are infected
- contact between yellow and blue results in transmission

I embedded this in a script with pygame too

- more complicated about 150 LOC.

- First class:

- Editor Annales de l’Institut Fourier
- Principal investigator l’equipe action
`ToFu`

persyval-lab - Local coordinator federation RAA
- Member of the Conseil de l’UFR IMAG2
- Ex directeur de GDR TRESSES
- [CV](./CV.pdf
- research statement
- my github account

Basically if you are looking for me on a Thursday well….forget it!

- Thursdays 10h30 Seminaire francophone
- Thursdays 14h TSG Grenoble
- Thursdays 15h CMSA Interdisciplinary Science Seminar
- Thursdays 16h Geometry and Topology Online

I am a (low dimensional) topologist a subject which has it’s origins in the work of the French mathematician Henri Poincaré. Recently I have been doing a lot of

I was a member of ICERM at Brown University in 2019 participating in Illustrating Math and visits to

- Boston College
- CUNY Graduate Center

Here is the book that we wrote during the semester.

And where I got time to do write stuff forInkscape like this Apollonian Packings

This is what I look like

IHP 2012 : La Maison des Maths

- I am principal investigator ToFu
- I am an associate member of GEAR
- I was
**director**of the GDR des Tresses

- WINTERBRAIDS
- Artin Groups, CAT(0) Geometry and Related Topics
- Teichmüller Theory: Classical, Higher, Super and Quantum
- Complex Hyperbolic Geometry and Related Topic
- Conférence internationale à la mémoire de Patrick Dehornoy

- Teichmueller space
- Modular group actions
- Applications to low dimensional topology

This is a quasi-Fuchsian manifold: it’s a basic kind of 3 manifold homeomorphic to the product of a surface and an interval together with a (non unique) choice of hyperbolic metric. Togther with Prof. S. Kojima of TITEC we are working on applying converegence results for quasi-Fuchsian manifolds and Teichmueller theory to get information about closed hyperbolic manifolds.

With Bill Goldman and a couple of his ex students we have been working on a book that just got published by the AMS. Much of it is dedicated to explaining this picture of an invariant fractal in the character variety.

Mostly geometry of surfaces and (elementary) number theory.

- Convexity and Aigner’s Conjectures
- EISENSTEIN INTEGERS AND EQUILATERAL IDEAL TRIANGLES
- GEOMETRY OF FERMAT’S SUM OF SQUARES
- On systoles and ortho spectrum rigidity

Talks are Reveal.js slides

- blue arrows = next/previous
- esc-key foroverview
- blue text is a link to a resource on the web

- Tokyo 7/12
- Toulouse 9/11
**Glasgow 7/6****Tokyo 3/6**(Geometry of discrete groups and hyperbolic spaces)**Warwick 28/5**(Colloquium)- Nantes 18/3

From March 2014 I’ve also been working with the fablab MSTIC making mathematical curiosities from wood. I’m mainly interested in constructing geometric objects in wood using kerf bending patterns. Wood prepared using a laser cutting machine can be bent and joined to like a 3 dimensional jigsaw puzzle. collection of pieces

In November 2014 I was invited to take part in a workshop forarchitectural students Architect 2.0 Grenoble to explain the techniques and possibilities.

After being abused by ed as a teenager I’ve recently converted to the church of neovim