I am currently a postdoc at the Research Institute for Symbolic Computation in Linz. Previously, I spent two years as a postdoc at San Francisco State University, funded by the DFG, after doing my PhD at the Freie Universität Berlin.

This page collects my published creative work, in mathematics, software and beyond.

Blog Mathematics Computer Science Economics Software Philosophy Teaching Community Video Fiction

Blog

On my personal blog I write about all kinds of things that interest me. The latest posts are shown on the right.

Mathematics

Here is a list of my formal mathematical articles. Note that in mathematics authors are always listed alphabetically.

Enumerating Colorings, Tensions and Flows in Cell Complexes (2012) with Matthias Beck, Logan Godkin and Jeremy Martin

Article at arXiv

Ehrhart f*-coefficients of polytopal complexes are non-negative integers (2012)

Felix Breuer, Ehrhart f*-coefficients of polytopal complexes are non-negative integers, Electronic Journal of Combinatorics 19(4), P16, 2012.

Article at EJC, Preprint at arXiv

Hypergraph Coloring Complexes (2012) with Aaron Dall and Martina Kubitzke

Felix Breuer, Aaron Dall, Martina Kubitzke, Hypergraph Coloring Complexes, Discrete Mathematics 312(16), 2407-2420, 2012.

Article at ScienceDirect, Article at arXiv

Ehrhart theory, Modular flow reciprocity, and the Tutte polynomial (2012) with Raman Sanyal

Felix Breuer, Raman Sanyal, Ehrhart theory, Modular flow reciprocity, and the Tutte polynomial, Mathematische Zeitschrift 270(1), 1-18, 2012.

Article at SpringerLink, Preprint at arXiv

Bounds on the Coefficients of Tension and Flow Polynomials (2011) with Aaron Dall

Felix Breuer, Aaron Dall, Bounds on the Coefficients of Tension and Flow Polynomials, Journal of Algebraic Combinatorics 33(3), 465-482, 2011.

Article at SpringerLink, Preprint at arXiv

Viewing counting polynomials as Hilbert functions via Ehrhart theory (2010) with Aaron Dall

Felix Breuer, Aaron Dall. Viewing counting polynomials as Hilbert functions via Ehrhart theory. In: 22nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2010). DMTCS, 413-424, 2010.

Article at DMTCS, Poster at FPSAC, Preprint at arXiv

Staircases in Z2 (2010) with Frederik von Heymann

Felix Breuer, Frederik von Heymann, Staircases in Z2, INTEGERS 10, 807-847, 2010.

Article at Integers, Preprint at arXiv

Counting Hexagonal Patches and Independent Sets in Circle Graphs (2010) with Paul Bonsma

Paul Bonsma, Felix Breuer. Counting Hexagonal Patches and Independent Sets in Circle Graphs. In: LATIN 2010: Theoretical Informatics; Alejandro López-Ortiz, editor. Lecture Notes in Computer Science Volume 6034, 603-614, 2010.

Article at SpringerLink, Preprint at arXiv

Uneven Splitting of Ham Sandwiches (2010)

Felix Breuer, Uneven Splitting of Ham Sandwiches, Discrete and Computational Geometry 43(4), 876-892, 2010.

Article at SpringerLink, Preprint at arXiv

Ham Sandwiches, Staircases and Counting Polynomials (2009)

PhD Thesis, Freie Universität Berlin, 2009.

Thesis at FU Berlin, Thesis as PDF

Finding Fullerene Patches in Polynomial Time (2009) with Paul Bonsma

Paul Bonsma, Felix Breuer. Finding Fullerene Patches in Polynomial Time. In: Algorithms and Computation: 20th International Symposium, ISAAC 2009; Yingfei Dong, Ding-Zhu Du, Oscar Ibarra, editors. Lecture Notes in Computer Science Volume 5878, 2009.

Article at SpringerLink, Preprint at arXiv

Gauss Codes and Thrackles (2006)

Diploma Thesis, FU Berlin, 2006.

Thesis as PDF

Domino-Pflasterungen und Aztekensterne (2006) with Daria Schymura

Felix Breuer, Daria Schymura, Domino–Pflasterungen und Aztekensterne, Mathematische Semesterberichte 53(1), 81 - 99, 2006.

Article at SpringerLink, Preprint as PDF

Computer Science

Analytic Feature Selection for Support Vector Machines (2013) by Carly Stambaugh, Hui Yang and Felix Breuer

To be presented at 9th International Conference on Machine Learning and Data Mining MLDM 2013.

Article at arXiv

Economics

Fund I/O

Fund I/O is both: exploratory research and a practical business model. The premise: crowdfunding and novel payment solutions can be used to put theoretical mechanisms for the private provision of public goods to real-world use.

There is no research paper on Fund I/O available yet, but I am keeping an open notebook on both my theoretical findings and practical considerations on my blog. If you want to read more, this is the post to start with. A full list of posts on Fund I/O can be found here.

Software

I am currently maintaining two open source software projects.

Qute

Qute is a text editor for Windows/Linux/Mac OS built around Markdown and MathJax. It offers TeX support and per-paragraph preview of markup (including typeset formulas)! It also an experiment in the visual aesthetics of text editing. There also is a version of Qute for Android, but that one offers fewer features.

InkBoard

InkBoard is an experimental pen-centric on-screen keyboard which I designed and implemented. It was written in Clojure and is available as open-source software. It is part of the larger InkCode project.

In the past I have been involved in several open source software projects, some of which are worth mentioning.

TeXmacs

TeXmacs is a scientific text editor. I helped implementing the converter to XML formats. I also built a prototype of a literate programming system for TeXmacs, which is still available here.

Heretix

Heretix was a source based GNU/Linux distribution, whose package manager was implemented as a Ruby script. I helped writing packages, maintaining the website and integrating a documentation system into the package manager itself. Heretix has been discontinued.

Teaching

Using Intuitive Geometry (2011)

In the fall term of 2011 I volunteered to teach Math 890 at San Francisco State University. The title of the course was "Using Intuitive Geometry - Using Geometric Intuition" and it dealt mainly with discrete geometry.

Course Materials on my Blog

Community

Mathblogging.org

Along with Peter Krautzberger and Frederik von Heymann, I am one of the co-founders of Mathblogging.org. Mathblogging.org is a blog aggregator for the mathematical blogging community. By providing an index of math blogs, editorial content and technological infrastructure we help readers from any background discover the mathematical blogosphere.

Geometry, the Majority Vote and the Power of Agenda Control

After serious police violence against Occupy protesters in the Bay Area, I joined mathematicians at UC Berkeley in organizing a teach-in. We gave public lectures on mathematical topics with a connection to polictics. I spoke on "Geometry, the Majority Vote and the Power of Agenda Control".

Teach-in, Lecture notes, Video on IndyMedia

Video

Der kleine Gauß (2010) with Peter Krautzberger

As an experiment in communicating mathematics Peter and I created this video about the intuitive meaning of Gauss' sum formula.

Video on Vimeo

Philosophy

Feldenkrais' Spontaneous Action and Laozi's Wuwei (2012)

Felix Breuer, Feldenkrais' Spontaneous Action and Laozi's Wuwei, Journal of Daoist Studies 5, 169 - 183, 2012.

Article as PDF, JDS at Lulu

Fiction

Now and then I have been writing fiction.

Eine inszenierte Revolte (2007)

Story as PDF

17 Gen r (2000)

"17 Gen r" is a fragment of a novel. I brought this project pretty far (beyond 100,000 words), but in the end I did not finish it.

Ein Jahr (1999)

The short story "Ein Jahr" was published in an anthology in 1999.

Story as PDF