Joint Seminar on Complex Algebraic Geometry and Complex Analysis (Bochum - Essen - Köln - Wuppertal)Photo by Max Greve and Timo Bobert
The "Joint Seminar on Complex Algebraic Geometry and Complex Analysis" is a research seminar, organised by the algebraic and complex geometry research groups in Bochum, Essen, Cologne, and Wuppertal. The seminar meets roughly twice per semester for a full day in Bochum, Essen, Cologne, or Wuppertal. There are three talks per meeting, both by invited guests and by speakers from the organising universities. We aim to leave ample room for discussions.
The talks are open for everyone. Contact one of the organisers if you are interested in attending the meeting. We have some funds that might help to support travel for some junior participants.
Meetings of the seminar are partially supported by
- SFB/TR 45 "Periods, moduli spaces and arithmetic of algebraic varieties"
- SFB/TR 191 "Symplectic structures in geometry, algebra and dynamics"
DATE AND PLACE
The next meeting will take place on Friday, July 5th, 2019 in Cologne.
- Tien-Cuong Dinh (Singapore / Cologne): Unique Ergodicity for foliations on compact Kähler surfaces
Let F be a holomorphic foliation by Riemann surfaces on a compact Kaehler surface. Assume it is generic in the sense that all the singularities are hyperbolic and that the foliation admits no directed positive closed (1,1)-current. Then there exists a unique (up to a multiplicative constant) positive ddc-closed (1,1)-current directed by F. This is a very strong ergodic property of F. Our proof uses an extension of the theory of densities to a class of non-ddc-closed currents. A complete description of the cone of directed positive ddc-closed (1,1)-currents is also given when F admits directed positive closed currents. The talk is based on a recent joint work with Viet-Anh Nguyen and Nessim Sibony.
- Xiaonan Ma (Paris VII / Cologne): Quantization commutes with reduction, a survey
We will review different versions of 'quantization commutes with reduction’ from Kahler to symplectic case. We will also consider the non-compact symplectic situation and the most recent result on CR manifolds.
- Nessim Sibony (Orsay): Equidistribution in Nevanlinna's Theory
The classical Nevanlinna theory is developed for maps from the complex plane with values in a projective variety. Motivated by the theory of singular foliations by Riemann surfaces and their dynamics, I will study the case where the source space is hyperbolic. It could be the disc or the unit ball. I will give applications to foliations by Riemann Surfaces.
10:30 - 11:30 Sibony
11:45 - 12:45 Ma
12:45 - 14:30 Lunch break
14:30 - 15:30 Dinh
Universität zu Köln
All talks will take place in Room 204 (Seminar room 2).
How to find the lecture hall: see the following map.
kevin [dot] fritsch [at] rub [dot] de
daniel [dot] greb [at] uni-due [dot] de
Universität zu Köln
gmarines [at] math [dot] uni-koeln [dot] de
Bergische Universität Wuppertal
jean [dot] ruppenthal [at] math [dot] uni-wuppertal [dot]de
26.4.2013, Bochum: Tim Kirschner, Christian Miebach, Henrik Seppänen
28.6.2013, Wuppertal: Rafael Andrist, Immanuel Stampfli, Matei Toma
22.11.2013, Bochum: Sébastien Boucksom, Egmont Porten, Sönke Rollenske
24.1.2014, Wuppertal: Clemens Jörder, Helge Ruddat, Jörg Winkelmann
16.5.2014, Bochum: Alberto Abbondandolo, Judith Brinkschulte, Julius Ross
20.6.2014, Wuppertal: Julie Déserti, Slawomir Dinew, Slawomir Rams
24.10.2014, Bochum: Henri Guenancia, Shulim Kaliman, Adriano Tomassini
15.12.2014, Wuppertal: Richard Lärkäng, Christian Miebach, Marco Spinaci
7.5.2015, Essen: Brent Doran, Erwan Rousseau, Emanuel Scheidegger
15.6.2015, Bochum: Roya Beheshti, Daniel Greb, Hossein Raufi
27.11.2015, Wuppertal: Francesco Bei, Kai Cieliebak, Tyson Ritter
1.2.2016, Essen: Ursula Ludwig, George Marinescu, Wenhao Ou
25.4.2016, Wuppertal: Gian Maria Dall’Ara, Christian Lehn, Luca Tasin
26.6.2016, Cologne: Chin-Yu Hsiao, Stefan Nemirovski, Nikhil Savale
25.11.2016, Bochum: Ana-Maria Brecan, Antonio di Scala, Dan Popovici
27.1.2017, Essen: Tim Kirschner, Viêt Anh Nguyên, Stefan Schreieder
21.4.2017, Wuppertal: Vicente Cortés, Philipp Naumann, Markus Reineke
7.7.2017, Cologne: Roger Bielawski, Dan Coman, Martin Schwald
3.11.2017, Bochum: Junyan Cao, Sönke Rollenske, Robert Szöke
1.2.2018, Essen: Gilberto Bini, Ruadhaí Dervan, Hendrik Herrmann
27.4.2018, Wuppertal: Hugues Auvray, Bernd Stratmann, Michael Lennox Wong
6.7.2018, Cologne: Turgay Bayraktar, Jarek Buczynski, Andrew Dancer
23.11.2018, Bochum: Ben Anthes, Kevin Fritsch, Ariyan Javanpeykar
18.1.2019, Essen: André Belotto, Andreas Höring, Valdemar Tsanov
12.4.2019, Wuppertal: Ya Deng, Christian Miebach, Duc Viet Vu