BIMSA > Geometric structures on surfaces \(ICBS\)
Geometric structures on surfaces
In this course, we give a panorama of geometric structures a topological surface can be endowed with. We will discuss combinatorial decompositions, natural dynamical systems and moduli spaces of these structures. We will focus on geometric structures compatible with a structure of Riemann surface (translation structures, dilation structures, cone spherical metrics...).
Lecturer
Guillaume Tahar
Date
28th March ~ 13th June, 2023
Location
Weekday Time Venue Online ID Password
Monday,Tuesday 14:20 - 16:05 A3-2a-202 ZOOM 08 787 662 9899 BIMSA
Prerequisite
Undergraduate general topology and complex analysis
Syllabus
Part I: Simplicial structures and Polyhedra
Part II: Basic theory of Riemann surfaces
Part III: Introduction to Translation surfaces
Part IV: Geometry of meromorphic differentials
Part V: A flat illustration of Morse Theory on surfaces
Part VI: Walls-and-chamber structures on strata of meromorphic differentials, Veech groups
Part VII: Isoresidual fibration and Mittag-Leffler theorem
Part VIII: Quadratic differentials, half-translation surfaces and cone spherical metrics with special monodromy
Part IX: Geometry of the moduli spaces of cone spherical metrics
If there is enough time, we will also discuss dilation and complex affine structures.
Reference
Donaldson: Riemann Surfaces
Zorich: Flat Surfaces
Audience
Undergraduate , Graduate
Video Public
No
Notes Public
No
Language
English
Lecturer Intro
Guillaume Tahar obtained his Ph.D from Université Paris Diderot, under the supervision of Anton Zorich. He was a senior postdoctoral fellow in Weizmann Institute of Science and joined BIMSA as an assistant professor in 2022. He contributed to the study of moduli spaces of various flavours of geometric structures on surfaces. His results include proving the existence of closed geodesics in dilation surfaces and the complete characterization of configurations of local invariants realized by a differential on a Riemann surface. His recent research interests include linear differential operators, simplicial arrangements of lines and quantum invariants of knots.