List of upcoming GAUS-Seminars in calendar

###### Recurring seminars

#### GAUS workshops series “The geometry of coherent sheaves: From derived categories to Higgs bundles”

In the summer term, there will be 4 meetings on Friday afternoons from 2pm to 5:30 pm on the following dates and topics:

- April 29th, Hodge and Poincaré polynomials of moduli spaces of bundles
- May 20th, Branes in Higgs bundle moduli spaces
- July 1st, P=W conjecture
- July 22st, Non-Abelian Hodge theory for real Lie groups and applications

Each time there will be 3 talks starting with a survey talk to get everybody on board followed by two talks about recent developments. The workshops will be organized in hybrid format: You can either join in person at Frankfurt university or via Zoom (a Zoomlink will be distributed close to the individual meetings). Some of the speakers will give an online talk, some of them will be present in person.

You can find more information one the workshop webpage.

Organizers:

Barbara Bolognese, Johannes Horn, Inder Kaur

(Goethe University Frankfurt a.M.)

#### TGIZ-Seminar: Tropical geometry in Zoom

This is a series of virtual Mini-Workshops on Tropical Geometry and neighboring areas. It takes place approximately once a month on Friday afternoon from 2-5:30 pm. For further information and a list of talks, see the seminar homepage.

Organizers:

Lorenzo Fantini, Andreas Gross, Martin Ulirsch

(Goethe University Frankfurt a.M.)

#### Oberseminar Algebra und Geometrie

The seminar takes place on Wednesdays from 16:00 to 17:00 on Zoom. For further information and list of talks see the GAUS Calendar.

Organizers:

Alex Küronya, Martin Möller, Jakob Stix, Martin Ulirsch, Annette Werner

(Goethe University Frankfurt a.M.)

#### Kolloquium Geometrie und Arithmetik

In Mainz we are organizing a seminar on Geometry and Arithmetic. The seminar takes place approx. every 2nd Thursday 14:15 — 15:15 in the Hilbertraum, Mainz. For further information and list of talks see the seminar homepage.

Organizers:

Manuel Blickle, Ariyan Javanpeykar, Manfred Lehn, Moritz Rahn, Georg Tamme

(Gutenberg University Mainz)

#### International Seminar on Automorphic Forms

The seminar takes place on Tuesdays, usually from 15:00 to 16:00 (German time, CET) via Zoom. The meetings start 15 minutes before the talk with a short coffee break. For further information see the specific seminar homepage.

Organizers:

Yingkun Li (TU Darmstadt)

Markus Schwagenscheidt (ETH Zurich)

#### Non-Archimedean and tropical geometry

The event, originally scheduled to take place at the Institut für Mathematik of the Goethe-Universität Frankfurt am Main in 2020, has been replaced by a series of online talks between October and December 2021. More specifically, the seminars take place online on Zoom or in a hybrid format every other Friday afternoon (Central European Time) starting at the beginning of October. For further information see the seminar homepage.

Organizers:

Lorenzo Fantini (École Polytechnique)

Martin Ulirsch (Goethe University Frankfurt)

Annette Werner (Goethe University Frankfurt)

## Algebra & Number Theory

The seminar takes place on Fridays from 13:30 to 15:00 in the MATHEMATIKON, SR A. For further information see the list of talks here: https://www.mathi.uni-heidelberg.de/events/?s=68&id_seminar_tab=2

Organizer: Alexander Schmidt (University Heidelberg)

#### Arithmetic Algebraic Geometry

The seminar takes place on Fridays from 15:30 to 17:00 in the mathematics department at TU Darmstadt, room S215 401 and on Zoom. For further information and list of talks see the GAUS Calendar.

Organizers:

Timo Richarz, Torsten Wedhorn

(Technical University of Darmstadt)