Contact
I am a postdoc at the Institut de Mathématiques de Jussieu at Sorbonne Université, supported by the Swiss National Science Foundation (SNSF). My hosts are Russell Avdek and Vincent Humilière.
Before that I did my PhD under the supervision of Felix Schlenk at the Université de Neuchâtel.
- Email:
- Johannes dot Hauber at unine dot ch
- Address:
- Institut de Mathématiques de Jussieu - Paris Rive Gauche (IMJ-PRG)
Sorbonne Université, Bureau 15-25-501
4 place Jussieu, 75005 Paris, France
Research
I work in symplectic topology, with a particular interest in symplectic embedding problems, rational homology balls, and singular Lagrangian skeleta. My research addresses both quantitative questions, such as symplectic capacities and embedding obstructions, and qualitative questions concerning the rigidity and classification of Lagrangian submanifolds.
Currently I'm thinking a lot about Katok ellipsoids and Vianna tori.
Articles
- The Gromov width of Katok ellipsoids
- (in preparation)
- with Vinicius G. B. Ramos and Felix Schlenk
- Lagrangian knotting and the symplectic topology of Lagrangian complements
- (in preparation)
- with Nikolas Adaloglou
- Quantitative symplectic topology of Katok's examples and equivariant symplectic embeddings
- arXiv:2609.35209
- with Nikolas Adaloglou
- The nearby Lagrangian conjecture for pinwheels
- arXiv:2605.22473
- with Nikolas Adaloglou and Gerard Bargalló i Gómez
- Markov staircases
- arXiv:2509.03224
- with Nikolas Adaloglou, Joé Brendel, Jonny Evans and Felix Schlenk
- Pinwheels in symplectic rational and ruled surfaces and non-squeezing of rational homology balls
- with Nikolas Adaloglou, arXiv: arXiv:2503.16250;
- Journal of Topology (2026) 19 (3).
- Semi-Local Exotic Lagrangian Tori in Dimension Four
- with Joé Brendel and Joel Schmitz, arXiv:2403.00408;
- Annales de l’institut Fourier (online).
Talks
Upcoming Talks
- IMPA (Rio de Janeiro, 25.01.2027–04.02.2027)
- "A hitchhiker's guide to the symplectic topology of almost toric fibrations" (with Nikolas Adaloglou)
- Oberseminar Geometrie und Analysis (Aachen, 03.12.2026)
- "The Gromov width of Katok ellipsoids"
Past Talks
- Symplectix seminar (Paris, 02.10.2026)
- "Quantitative symplectic topology of Katok's examples"
- Unine symplectic working group (Neuchâtel, 22.09.2026)
- "Can the superpotential of a torus detect a degeneration in its complement?"
- Séminaire de topologie, géométrie et algèbre (Nantes, 11.12.2025)
- "The symplectic topology of rational homology balls"
- Oberseminar dynamical systems (Bochum, 25.11.2025)
- "Embedding questions of rational homology balls"
- Plane curves and symplectic geometry (Les Marécottes, 21.09.2025)
- "Uniqueness of pin-ellipsoid embeddings in CP2"
- Symplectic geometry seminar (Berlin, 07.07.2025)
- "Symplectic staircases, old and new"
- AGNT seminar (Leiden, 17.11.2024)
- "Local exotic tori in four dimensional symplectic manifolds"