Blog

Goodbye Wordpress, Hello Jekyll!
Date: June 7, 2018
Tags: etc, infrastructure

I am currently in the process of migrating my old Wordpress site to a collection of static pages, generated by Jekyll. I am migrating because of the following reasons:

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Talk: Ascents in Non-Negative Lattice Paths
Date: February 14, 2018
Tags: math, talk, lattice paths

Today, in the last week of my four week research stay at Stellenbosch University, I gave a talk on a recent cooperation with Clemens Heuberger and Helmut Prodinger.

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Seminar: Analysis of a Growth Process for Plane Trees
Date: July 7, 2017
Tags: math, talk, trees, growth

This week I am giving a two-part talk series in Mark Ward’s informal seminar on Analytic Combinatorics at Purdue University.

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Schulvortrag @ BRG Viktring
Date: June 14, 2017
Tags: math, talk, school

Es war mir eine besondere Freude, heute in meiner ehemaligen Schule, dem BRG Viktring, einen Vortrag aus Mathematik vor den 7. Klassen halten zu dürfen.

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Summer School: Techniques in Random Discrete Structures
Date: May 24, 2017
Tags: math, summer school

I’m currently in Athens at the summer school “Techniques in Random Discrete Structures”, where I am responsible for the exercise sessions.

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Talk: On Reductions of Plane Trees
Date: April 7, 2017
Tags: math, talk, tree, reduction

I’m currently visiting my mentor Helmut Prodinger at Stellenbosch University in South Africa, and today I gave a talk in the local colloquium.

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Talk @ ANALCO17: Iterative Cutting and Pruning of Planar Trees
Date: January 19, 2017
Tags: math, talk, tree, reduction

I gave a talk at the 2017 Meeting on Analytic Algorithmics and Combinatorics (ANALCO17).

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Mathematik-Seminar der Hans-Riegel-Stiftung
Date: September 25, 2016
Tags: math, teaching

Today I held an invited workshop on combinatorics and the symbolic method at the Mathematical Institute of Bonn University (Bonn, Germany) for alumni who received a “Hans-Riegel-Fachpreis”.

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Talk @ AEC2016: On Reductions of Rooted Plane Trees
Date: August 1, 2016
Tags: math, talk, tree, reduction

Today I gave a talk at AEC Summerschool 2016 at JKU’s Research Institute for Symbolic Computation (RISC) in Hagenberg, Austria.

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Talk @ AofA16: The Register Function and Reductions of Binary Trees and Lattice Paths
Date: July 8, 2016
Tags: math, talk, register function, reduction

On July 8, I gave a contributed talk at this years 27th edition of the International Conference on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms (AofA’16), which took place in Kraków, Poland.

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Talk: On a Reduction of Lattice Paths
Date: March 4, 2016
Tags: math, talk, reduction, lattice paths

Today I gave a talk at Stellenbosch University (South Africa) presenting my current research on a reduction procedure for two-dimensional lattice paths consisting of the four steps up, right, down, left.

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Jupyterhub with SageMath Kernel
Date: March 4, 2016
Tags: software, SageMath, jupyterhub

Recently I made some efforts to get a Jupyterhub instance with a SageMath kernel up and running on one of my servers — with success! 🙂 Actually, the installation is really not that difficult. Nevertheless, I want to write a few lines describing the troubles I ran into and my solutions.

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Google Summer of Code 2015: Conclusion
Date: August 22, 2015
Tags: GSoC15, SageMath

The “Google Summer of Code 2015” program has ended yesterday, on the 21. of August at 19.00 UTC. This blog entry shall provide a short wrap-up of our GSoC project.

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Asymptotic Expressions: Current Developments
Date: August 17, 2015
Tags: GSoC15, SageMath

Since my last blog entry on the status of our implementation of Asymptotic Expressions in SageMath quite a lot of improvements have happened. Essentially, all the pieces required in order to have a basic working implementation of multivariate asymptotics are there. The remaining tasks within my Google Summer of Code project are:

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Computing with Asymptotic Expressions
Date: July 16, 2015
Tags: GSoC15, SageMath

It has been quite some time since my last update on the progress of my Google Summer of Code project, which has two reasons.

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House(s) of Cards
Date: June 15, 2015
Tags: math, cards

When I sat at our family dinner on Saturday, I watched my cousin build a house of cards from coasters. At one point he said to me: “I want to build a reeeally tall house of cards. One with like 100 levels! Do you think we could collect enough coasters from the tables around here?”. The question got me interested, and so I decided to do some counting.

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Asymptotic Expressions: Motivation
Date: May 29, 2015
Tags: GSoC15, SageMath

So, as Google Summer of Code started on Monday, May 25th it is time to give a proper motivation for the project I have proposed. The working title of my project is (Multivariate) Asymptotic Expressions, and its overall goal is to bring asymptotic expressions to SageMath.

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Algebraic Function Fields of Genus 0
Date: May 24, 2015
Tags: algebraic curves

In this post I want to discuss the exercises from our Algebraic Curves course I worked on (and struggled with) last week.

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Google Summer of Code — Countdown
Date: May 23, 2015
Tags: GSoC15

Today I received the welcome package for attending this year’s “Google Summer of Code”! Actually, it’s pretty cool; the following things were included:

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