A note on pronunciation: my surname rhymes with "feast" and "least". It does not rhyme with "Christ" and it does not rhyme with "Trieste".
Date of birth: 29.Dec 1970. I grew up in Darmstadt (Germany), and I studied for 3 years at the Universität Bayreuth.
I did my MSc and PhD at Warwick University in England, under the supervision of Colin Rourke
I worked as a postdoc for 2 years at the CMI Marseille (France) with Hamish Short, financed by a grant from the European Community.
Then I worked for another 2 years at the Pacific institute for the mathematical sciences at UBC in Vancouver (Canada), where my research advisor was Dale Rolfsen.
Since September 2001 I work in Rennes.
Since December 2019 I am a naturalized French citizen.
I am married to Aline Roumy. We have two little boys, born in 2009 and 2013.
I am an amateur musician. I play the viola. (Note that it is unfortunately not me who is playing in this video.)