I am a mathematician working as a professor at University of Cologne.
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Our Poisson Geometry group in Cologne.
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Together with Christian Blohmann, Steffen Sagave, Marius Crainic and Ieke Moerdijk, we are organizing the series of workshops: Higher Geometric Structures along the Lower Rhine. The next installment will be on September 25-26 2025, at University of Cologne.
Together with Hansjörg Geiges, George Marinescu, Silvia Sabatini, and Duc Viet Vu, we are organizing the Oberseminar Geometrie, Topologie und Analysis, at University of Cologne.
Together with Marco Zambon, Ana Bălibanu, Jianghua Lu and Leonid Ryvkin, we organzed the BIRS workshop Around Singularities in Poisson Geometry, at the Institute for Advanced Study in Mathematics, in Hangzhou, China, from August 3 to August 8, 2025.
Meetings on Poisson Geometry, I organized at Radboud University: 2018, 2023 and 2024.
My research is in the field of Poisson geometry. This field originated from classical mechanics, and has strong interactions with other subfields of differential geometry, especially symplectic geometry, foliation theory and Lie theory.
The main focus of my work has been studying local normal forms for Poisson structures and the theory of deformations for Poisson manifolds.
I am also very interested in trying to implement techniques from symplectic topology in Poisson geometry and developing a field of ``Poisson topology”. Ideas from symplectic topology could provide global invariants in Poisson geometry, and, on the other hand, the more general Poisson-geometric perspective could shed new lights onto classical results in symplectic topology.
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