Master of Science,
Physics, University of Groningen, September 2000-August 2005.
Thesis: Branes as geodesic motion.
Supervisor: Prof.dr.E.A.Bergshoeff.

For more information see my complete CV.

• Resonance sets
• Singularity theory
• Lyapunov-Schmidt reduction

• Technical presentation on resonance tongues.
• Non-technical presentation on dynamical systems, bifurcations and resonance.

• Voorlichtingscommissie
• Computerbeleidscommissie
• Commissie landelijke AiO-dag 2006
• Commissie AiO-colloquium

• H.W. Broer, S.J. Holtman and G. Vegter. Recognition of the bifurcation type of resonance in mildly degenerate Hopf-Neimark-Sacker families, Nonlinearity, 21:2463-2482, 2008 (Extra information).
• H.W. Broer, S.J. Holtman, G. Vegter and R.Vitolo.
  Geometry and dynamics of mildly degenerate Hopf-Neimarck-Sacker families near resonance, Nonlinearity, 22:2161-2200, 2009.
• H.W. Broer, S.J. Holtman and G. Vegter.
  Recognition of resonance type in periodically forced oscillators, preprint, 2009 (Extra information).
• A. Chattopadhyay, S.J. Holtman and G. Vegter.
  Certified computation of planar Morse-Smale complexes. Abstracts of the 26th European Workshop on Computational Geometry, Dortmund, Germany, pag. 105-108, March 22-24, 2010.
• S.J. Holtman,
  Dynamics and geometry near resonant bifurcations, thesis, 2009.

• Dynamical systems on Wikipedia