Research
My research is mostly in symplectic topology and applications to Hamiltonian and Reeb dynamics.
I am also interested in understanding differential topology of orbifolds
Workshops and seminars
Publications
- On the transitivity of the group of orbifold diffeomorphisms, with Thomas Rot, to appear in Transformation Groups.
- Degree theory for orbifolds., joint with Thomas Rot, Topology Appl. 282 (2020), 107326.
- Rabinowitz Floer Homology for Tentacular Hamiltonians, with R. C. Vandervorst and Jagna Wiśniewska, International Mathematics Research Notices (2020).
- Bounds for tentacular Hamiltonians. with Jagna Wiśniewska , Journal of Topology and Analysis, Vol. 12, No. 01, pp. 209-265 (2020).
- On periodic orbits in cotangent bundles of non-compact manifolds., with Jan Bouwe van den Berg, Thomas Rot, and Rob Vandervorst, Journal of Symplectic Geometry 14 (nr. 4), pp. 1145-1173 (2016).
- A shor history of the Weinstein Conjecture, Jahresber. Dtsch. Math. Ver. 114, pp. 119-130 (2012).
- Closed characteristics on non-compact hypersurfaces in R2n, with Jan Bouwe van den Berg and Rob Vandervorst, Math. Ann. 343, 247 (2009).
- Desingularisation of orbifolds obtained from symplectic reduction at generic coadjoint orbits, with Klaus Niederkrüger, Int. Math. Res. Not. IMRN, no. 23, Art. ID rnp95, pp. 4463-4479 (2009).
- Resolution of symplectic cyclic orbifold singularities , with Klaus Niederkrüger, J. of Symplectic Geom. 7, no. 3, pp. 337-355 (2009).
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A formula for the Chern classes of symplectic blow-ups , with Hansjoerg Geiges , J. London Math. Soc. (2) 76 (2007), 313-330.
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Symplectic geography in dimension 8, Manuscripta Math. 116, pp. 341-355 (2005).
Teaching
- In 2020-21 I am teaching Wiskundige Structuren (fall semester) and Algebra 1 (spring semester, together with Martin Bright ). All information about these courses is available via Brightspace.
PhD Students