SAG WS 2025/26
The seminars take place at the Max Planck Institute (MPIM) at 10:30
16.10.25: Weite Pi (Bonn)
Title: Mumford relations and the cohomology of Le Potier moduli spaces
Abstract: The geometry and topology of Le Potier moduli space, i.e. the moduli of 1-dimensional sheaves on the projective plane, have been studied intensively for decades. One particular interest in this moduli space arises from enumerative geometry — the perverse filtration on cohomology associated with a natural support map encodes the so-called refined BPS invariants for local P2. Thus it is important to study this cohomology. In this talk, we construct geometrically a family of tautological relations for this moduli space, originally due to Mumford on the moduli of bundles on curves, and derive several structural results on the cohomology. Based on joint works with Yakov Kononov, Woonam Lim, Miguel Moreira, and Junliang Shen.
23.10.25: Patrick Kennedy-Hunt (MPIM)
Title: TBA
Abstract: TBA
30.10.25: Stefan Schröer (Düsseldorf)
Title: Surfaces of general type and sl_2 triples
Abstract: TBA
06.11.25: Kabeer Manali Rahul (Canberra ANU)
Title: Metric techniques for triangulated categories
Abstract: Neeman has introduced the notion of metrics and approximable triangulated categories. These ideas have been used by Neeman and others to prove a remarkable array of results. In this talk we will discuss some of these results, and their implications in the setting of algebraic geometry. In particular, we discuss a result on passing between (left/right) admissible subcategories of the various essentially small subcategories associated to a variety.
13.11.25: Dimitri Wyss (EPFL)
Title: TBA
Abstract: TBA
20.11.25: Cécile Gachet (Bochum)
Title: TBA
Abstract: TBA
27.11.25: Domenico Valloni (EPFL)
Title: TBA
Abstract: TBA
04.12.25: Franco Rota (Paris-Saclay)
Title: TBA
Abstract: TBA
11.12.25: Jefferson Baudin (EPFL)
Title: TBA
Abstract: TBA
18.12.25: Yun Shi (Cambridge)
Title: TBA
Abstract: TBA
08.01.26: Miguel Moreira (MIT)
Title: TBA
Abstract: TBA
15.01.26: Qaasim Shafi (Heidelberg)
Title: TBA
Abstract: TBA
22.01.26: Lyalya Guseva (Moscow HSE)
Title: TBA
Abstract: TBA
29.01.26: Andrea Fanelli (Bordeaux)
Title: TBA
Abstract: TBA
Preprint seminar WS 2025/26
The seminars take place at the Max Planck Institute (MPIM) at 9:00
23.10.25: Riccardo Carini, The Hitchin morphism on algebraic surfaces (after Song-Sun)
30.10.25: Tudor Padurariu, Center of Kostant algebra (after Hausel)
06.11.25: Giacomo Mezzedimi, Arithmetic degree and its application to Zariski dense orbit conjecture (after Matsuzawa-Xie)
13.11.25: TBD
20.11.25: Gebhard Martin
27.11.25: TBD
04.12.25: TBD
11.12.25: TBD
18.12.25: TBD
08.01.26: TBD
15.01.26: TBD
22.01.26: TBD
29.01.26: TBD