PhD graduated: Kristin Shaw (December 2011), Lionel Lang (December 2014), Nikita Kalinin (December 2015), Mikhail Shkolnikov (June 2017), Johannes Josi (February 2018).

Current members:Thomas Blomme, Grigory Mikhalkin, Mikhail Pirogov.

Alumni: Ivan Bazhov, Johan Bjorklund, Rémi Crétois, Weronika Czerniawska, Yi-Ning Hsiao, Jens Forsgard, Maxim Karev, Ilya Karzhemanov, Sergei Lanzat, Michele Nesci, Alina Pavlikova, Johannes Rau, Arthur Renaudineau.

We organize several seminars:

Séminaire "Fables Géométriques".

pre-2017 Battelle Seminar and

Tropical working group Seminar.

Also, you can check how tropical curves (and hypersurfaces, in general) emerge from abelian sandpile models: tropicalsand

Monday, February 27, 2023
room 6-13

15h00 — Evgeni Abakoumov (Paris/Eiffel U)

Chui's conjecture аnd rational approximation

C. K. Chui conjectured in 1971 that the average gravitaional field strength in the unit disk due to unit point masses on its boundary was the smallest when these point masses were equidistributed on the circle. We will present an elementary solution to some weighted versions of this problem, and discuss related questions concerning approximation of holomorphic functions by simple partial fractions. This is joint work with A. Borichev and K. Fedorovskiy.

16h00 — Ferit Ozturk (Istanbul/Bosphorus U and Budapest/Renyi Inst)

Every real 3-manifold admits a real contact structure

We survey our results regarding real contact 3-manifolds and present our result in the title. A real 3-manifold is a smooth 3-manifold together with an orientation preserving smooth involution, called a real structure. A real contact 3-manifold is a real 3-manifold with a contact distribution that is antisymmetric with respect to the real structure. The standard examples of real contact 3-manifolds are link manifolds of isolated, real analytic surface singularities. We show that every real contact 3-manifold can be obtained via contact surgery along invariant knots starting from the standard real contact 3-sphere. As a corollary we show that any oriented overtwisted contact structure on an integer homology real 3-sphere can be isotoped to be real.

seminar page

Schedule and more details: seminar page

We had our page http://www.unige.ch/math/folks/langl/battelle/

Also, there is Séminaire de Géométrie Tropicale in Paris:http://erwan.brugalle.perso.math.cnrs.fr/Seminaires/Geotrop/Geotrop.html

Old Events

Old conferences

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Latex support is here. $\int \mathbb C + \prod\limits_{x\to \infty} f^g$

History of tropical geometry