**IMPANGA** is an algebraic geometry seminar organized by Piotr Achinger, Jarosław Buczyński, and Michał Kapustka.
In the academic year 2023/24, the seminar meets twice per month for a one day session on **Friday**, with two 60 min talks separated by a lunch break **(11:00-12:00 and 13:30-14:30)**.
IMPANGA meets in **Room 403 at IMPAN** (unless stated otherwise).

IMPANGA was founded at IMPAN in 2000 by late Piotr Pragacz. See here for information on former meetings of IMPANGA

## Upcoming meeting

## Future meetings

## Past meetings (2023/24 term)

### Jun 7 (impanga 457)

#### Quasi-projective contact log varieties

**Speaker:**Adrian Langer (MIMUW)

11:00–12:00, IMPAN 403

#### Frobenius pushforwards of vector bundles on projective spaces

**Speaker:**Feliks Rączka (IMPAN)

13:30–14:30, IMPAN 403

### May 24 (impanga 456)

#### Bounding the multiplicity of Fano toric varieties: ideas for a weight/topological classification

**Speaker:**Michele Rossi (University of Milano-Bicocca)

11:00–12:00, IMPAN 403

### May 10 (impanga 455)

#### Analytic homotopy theory and relative rigid cohomology

**Speaker:**Alberto Vezzani (University of Milan)

11:00–12:00, IMPAN 403

#### Derived categories of generalized Grassmannians

**Speaker:**Marco Rampazzo (University of Bologna)

13:30–14:30, IMPAN 403

### April 12 (impanga 454)

#### Singular del Pezzo surfaces of rank one in arbitrary characteristic

**Speaker:**Karol Palka (IMPAN)

11:00–12:00, IMPAN 403

#### Examples of Mori Dream spaces of Picard rank 2 and their birational geometry

**Speaker:**Tiago Duarte Guerreiro (Paris-Saclay University)

13:30–14:30, IMPAN 403

### March 15 (impanga 453)

#### Deformations of Calabi-Yau varieties in mixed characteristic

**Speaker:**Lenny Taelman (University of Amsterdam)

11:00–12:00, IMPAN 403

#### Symmetries of double EPW sextics and double EPW cubes

**Speaker:**Tomasz Wawak (Jagiellonian University)

13:30–14:30, IMPAN 403

### March 1 (impanga 452)

#### Conic Bundles of K3 type and Hyperkähler manifolds

**Speaker:**Marcello Bernardara (Institut de Mathématiques de Toulouse)

11:00–12:00

#### Stability of Tangent Bundle of Toric Varieties

**Speaker:**Özhan Genç (Jagiellonian University)

13:30–14:30

The meeting will take place in the lecture room of the Kraków branch of IMPAN.

Adress:

Adress:

**ul. św. Tomasza 30/7, Kraków**.### January 12 (impanga 451)

#### Behrend function is not constant and why this matters

**Speaker:**Joachim Jelisiejew (MIMUW)

11:00–12:00, IMPAN 403

#### Initial values of ML-degree polynomials

**Speaker:**Maciej Gałązka (MIMUW)

13:30–14:30, IMPAN 403

### December 15 (impanga 450)

#### Cohomology theories and rings of functions

**Speaker:**Kamil Rychlewicz (ISTA)

13:30–14:30, IMPAN 403

Additionally, there is going to be a

**public defence of Maciej Gałązka**on zoom on**15th December, 16:00**. However, there is going to be an informal group watching the defence on site, at the University of Warsaw, Faculty of Mathematics, Computer Science and Mechanics (ul. Banacha 2, Warszawa). If you wish to join the zoom meeting, write an email to rnd.matinf@uw.edu.pl till 13th December. They will send you a zoom link. If you wish to join the informal group watching the defence on site, come to room**5440**at the Faculty of Mathematics, Computer Science and Mechanics (ul. Banacha 2, Warszawa).### December 1 (impanga 449)

#### Constructions of derived equivalent hyper-Kaehler fourfolds

**Speaker:**Grzegorz Kapustka (Jagiellonian University)

11:00–12:00, Kraków

#### A motivic Riemann-Roch theorem for Deligne-Mumford stacks

**Speaker:**Neeraj Deshmukh (IMPAN)

13:30–14:30, Kraków

Meeting in Kraków branch.

Adress:

Adress:

**ul. św. Tomasza 30/7, Kraków**.### November 17 (impanga 448)

#### Conjectures on L-functions for varieties over function fields and their relations

**Speaker:**Veronika Ertl (IMPAN)

11:00–12:00, IMPAN 403

#### Rational points on 3-folds with nef anti-canonical class over finite fields

**Speaker:**Fabio Bernasconi (University of Basel)

13:30–14:30, IMPAN 321

### October 20 (impanga 447)

#### Nakajima's creation operators and the Kirwan map

**Speaker:**Jakub Koncki (IMPAN)

13:30–14:30, IMPAN 403

### October 06 (impanga 446): special meeting in honor of Piotr Pragacz

#### Degeneracy loci, Schur Functions, Schubert Calculus and Wronskians

**Speaker:**Letterio Gatto (Politecnico di Torino)

11:00–12:00, IMPAN 321

#### A special Calabi–Yau degeneration with trivial monodromy

**Speaker:**Sławomir Cynk (UJ)

13:30–14:30, IMPAN 321

14:45-15:15

15:15-15:45

15:45-17:00

**Performance by Giuseppe Gatto (tenor) accompanied by Ignacy Kozakiewicz (electric piano)**in room**106**15:15-15:45

**Memories of Piotr Pragacz**in room**321**15:45-17:00

**Reception**in room**409**Contact:

*jakubkoncki@impan.pl*

Mailing list: https://groups.google.com/a/impan.pl/g/impanga-mailing-list