Ech sinn ech an Du bass Du.

I am a pure mathematician by trait. My professional work as a programmer was motivated by the classification of lattices over algebraic number fields and by the analysis of large lattice genera. See my website at TU Dortmund University for further information.

In my free time I am developing a game engine, using the DirectX APIs, for Windows in C++. Computer games are a perfect way to bring my interests in mathematics, physics, computer science, history and mythology together. I thus recently started my journey into game programming and decided to share my discoveries with you.

When not thinking about some abstract mathematical problems, I like to read, to work out, to cook and to play computer games. I especially enjoy exploring fantasy worlds and studying their lore: be it while strolling through the gardens of the Shire in the highly developed high fantasy world of Middle-Earth, searching for Elder Scrolls in Tamriel, protecting space hamsters at the Sword Coast, ﬁghting the Burning Legion in Azeroth or hunting Zerg in the Koprulu sector.

## Freelancer

I am always looking for new opportunities to improve my programming skills and to learn new technologies. If you have a great idea in mind and need some programming help to realize your idea, feel free to contact me, either directly (see below) or via PeoplePerHour:

#### Code Repository

You can find most of the software that I developed in my GitLab repository:

$\qquad$ Symplectos

## Private Lessons

I have more than ten years of experience as a private tutor for high school mathematics as well as eight years of experience explaining abstract mathematical concepts to freshmen, either in tutorial groups or as an experienced staff at the help desk for mathematics at the TU Dortmund University. It is always a privilege to witness the epiphanic realization, that mathematics is indeed not as difficult and as intrinsically evil as a priori believed.

To schedule private lessons, either contact me directly (see below) or click the button on the bottom right of this page, it will open a calendar view with all available dates. For more information, see here.

### Contact

$\qquad$ (yek PGP) ue.setyb0lleb@tolleb.sellig --- DI-xoT

$\qquad$ Share with me via Nextcloud

### Work Experience

###### September 2018 - March 2019

High School Mathematics Teacher at the Lycée des Arts et Métiers in Luxembourg.

###### April 2014 - March 2018

Research fellow at the institute for Algebra and Geometry at the faculty for mathematics at TU Dortmund University in Germany.

###### 2010 - 2014

Teaching assistant at the faculty for mathematics at the University of Dortmund in Germany.

###### 2002, 2003 and 2008

Internship as a programmer at Siemens Luxembourg.

My curriculum vitae is available in German and English.

### Donations

Should you find the information on this blog helpful or interesting, feel free to send a small donation via PayPal. After all, as the great Erdős Pál explained, mathematicians are devices for turning coffee into theorems - and coffee isn't free (not to mention that I don't even drink coffee). However, $7.83$ € are enough to buy my favourite tea.

Can you guess (or continue) the following sequence? Hint: try to visualize the numbers by a geometrical shape.

$1$, $5$, $12$, $22$, $35$, $51$, $70$, $92$, $117$, $145$, $176$, ...

Thank you for your support!