My name is Sebastiaan Janssens. I work in Utrecht and Twente, The Netherlands, as a PhD student of Odo Diekmann, Stephan van Gils and Yuri Kuznetsov. My interests center around

Applied analysis and dynamical systems (in particular non-linear dynamics in spaces of measures, delay equations, semigroups for evolution equations, stability and bifurcation, control, approximation)

Population dynamics and mathematical economics (in particular structured biological populations, resource competition, microeconomic theory, foundations of economics)

Publications:
  • S.A. van Gils, S.G. Janssens, Yu.A. Kuznetsov, S. Visser
    On local bifurcations in neural field models with transmission delays
    Journal of Mathematical Biology 66 (2013), no. 4-5, 837-887
    (published paper - copy available on arxiv.org)

A Dutchman without a pipe is a national impossibility.
If a Dutchman were deprived of his pipe and tobacco,
he would not even enter Paradise with a glad heart.
-- Johannes Christiaan Schotel (?)
Contact Details

Sebastiaan Janssens
Mathematical Institute
Budapestlaan 6
3584 CD Utrecht
The Netherlands
room: 8.05



Teaching

  • Spring 2011: Differential equations exercise class (see course page)

  • Spring 2011: Linear Algebra B exercise class (see course page)

  • In the academic year 2009-2010 the MRI offers an international masterclass on Numerical Bifurcation Analysis of Dynamical Systems in which I occasionally assisted. For more information, see Yuri Kuznetsov's page on this. 
  • In Autumn 2008 I again taught "Wat is Wiskunde" (What is Mathematics?), an introductory course for first-year mathematics students aimed at obtaining a working knowledge about logic, sets, proofs, functions and relations.

  • In Spring 2008 I assisted in the national master course "Dynamical systems generated by ordinary differential equations and maps". See this page for lecture notes, practicum sessions and more.

  • In Autumn 2007 I taught "Wat is Wiskunde" (What is Mathematics?), an introductory course for first-year mathematics students aimed at obtaining a working knowledge about logic, sets, proofs, functions and relations.

Bookmarks by Category

Monarchy


Currently The Netherlands are a monarchy.

I find this truly ridiculous. Indeed, in a country that calls itself a democracy it should be a matter of principle (yes, principles still exist in this era of pragmatism and opportunism) that the head of state is to be elected. Family succession is for cowards, not for true democrats.

Besides of that, with families one never knows what one has to take into the bargain...
cartoon taken from spotpen.nl  


Religion

Curious George smoking a pipe
“I am tolerant because religious institutions facilitate some very important work that would not get done otherwise, but then I look around and see what an incredible amount of damage religion is doing… It would not matter so much that people believe lies, but when they go out and beat other people up because they believe different lies, that’s another thing.”

Taken from a 2001 interview with John Maynard Smith (1920-2004)

I cannot but concur.


Last Update: 07-03-2013