University webpage

There is an "official" webpage for me on the website of the University of Groningen.

Social media for researchers

I have accounts with ResearchGate and Mendeley. I usually neglect curating either of these so the information there tends to be outdated. I also learn new things by hanging around MathOverflow.


I write code to solve problems.

All programs I write (and all mathematical papers) live under git's version control. For most projects I keep a central repository at Bitbucket. I chose Bitbucket because it offers unlimited accounts for academic users.


I keep a list of links to webpages that I found interesting at some time in the past on Pinboard.


I appreciate good photography. In the past years I have been carrying a Nikon D5000, usually with the versatile AF-S DX NIKKOR 18-200mm f/3.5-5.6G and occasionally with the lighter AF-S DX NIKKOR 35mm f/1.8G. Some of my photos are on flickr.

Recently, my main photographic subject has been my son and my camera of necessity an iPhone XS. Because it is always there and always connected.