Seminar, Algebra & Geometry

Roberto Pirisi: Brauer groups of moduli problems via enumerative geometry

2 Apr

Seminar, Algebra & Geometry

Wednesday 2025-04-02, 13:15 - 14:15

Participating: Roberto Pirisi (University of Naples)

Location: KTH, 3418

2025-04-02T13:15:00.000+02:00 2025-04-02T14:15:00.000+02:00 Roberto Pirisi: Brauer groups of moduli problems via enumerative geometry (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Roberto Pirisi: Brauer groups of moduli problems via enumerative geometry (Seminar, Algebra & Geometry)

Luca Terenzi: The six functor formalism for perverse Nori motives

9 Apr

Seminar, Algebra & Geometry

Wednesday 2025-04-09, 13:15 - 14:15

Participating: Luca Terenzi (ENS de Lyon)

Location: Albano, Cramér room

2025-04-09T13:15:00.000+02:00 2025-04-09T14:15:00.000+02:00 Luca Terenzi: The six functor formalism for perverse Nori motives (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Luca Terenzi: The six functor formalism for perverse Nori motives (Seminar, Algebra & Geometry)

David Rydh: Functorial flatification by blow-ups

16 Apr

Seminar, Algebra & Geometry

Wednesday 2025-04-16, 13:15 - 14:15

Participating: David Rydh (KTH)

Location: KTH, 3418

2025-04-16T13:15:00.000+02:00 2025-04-16T14:15:00.000+02:00 David Rydh: Functorial flatification by blow-ups (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)David Rydh: Functorial flatification by blow-ups (Seminar, Algebra & Geometry)

Siddarth Kannan: Pólya–Petersen theory for moduli spaces of curves and maps

23 Apr

Seminar, Algebra & Geometry

Wednesday 2025-04-23, 13:15 - 14:15

Participating: Siddarth Kannan (MIT)

Location: Albano, Cramér room

2025-04-23T13:15:00.000+02:00 2025-04-23T14:15:00.000+02:00 Siddarth Kannan: Pólya–Petersen theory for moduli spaces of curves and maps (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Siddarth Kannan: Pólya–Petersen theory for moduli spaces of curves and maps (Seminar, Algebra & Geometry)

Shin Hattori: D-elliptic sheaves and the Hasse principle

7 May

Seminar, Algebra & Geometry

Wednesday 2025-05-07, 13:15 - 14:15

Participating: Shin Hattori (Tokyo City University)

Location: Albano, Cramér room

2025-05-07T13:15:00.000+02:00 2025-05-07T14:15:00.000+02:00 Shin Hattori: D-elliptic sheaves and the Hasse principle (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Shin Hattori: D-elliptic sheaves and the Hasse principle (Seminar, Algebra & Geometry)

Leonardo Patimo: Atomic Decompositions in Hecke Algebras and Crystal Graphs

21 May

Seminar, Algebra & Geometry

Wednesday 2025-05-21, 13:15 - 14:15

Participating: Leonardo Patimo (Pisa)

Location: Albano, Cramér room

2025-05-21T13:15:00.000+02:00 2025-05-21T14:15:00.000+02:00 Leonardo Patimo: Atomic Decompositions in Hecke Algebras and Crystal Graphs (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Leonardo Patimo: Atomic Decompositions in Hecke Algebras and Crystal Graphs (Seminar, Algebra & Geometry)

Chirantan Chowdhury: Abstract Six-Functor Formalisms and Motivic Homotopy Theory of Algebraic Stacks

28 May

Seminar, Algebra & Geometry

Wednesday 2025-05-28, 13:15 - 14:15

Participating: Chirantan Chowdhury (Darmstadt)

Location: KTH, 3418

2025-05-28T13:15:00.000+02:00 2025-05-28T14:15:00.000+02:00 Chirantan Chowdhury: Abstract Six-Functor Formalisms and Motivic Homotopy Theory of Algebraic Stacks (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Chirantan Chowdhury: Abstract Six-Functor Formalisms and Motivic Homotopy Theory of Algebraic Stacks (Seminar, Algebra & Geometry)

Marion Jeannin: On smooth integration of p-nilpotent Lie algebras in positive characteristic

18 Jun

Seminar, Algebra & Geometry

Wednesday 2025-06-18, 13:15 - 14:15

Participating: Marion Jeannin (SU)

Location: Albano, Cramér room

2025-06-18T13:15:00.000+02:00 2025-06-18T14:15:00.000+02:00 Marion Jeannin: On smooth integration of p-nilpotent Lie algebras in positive characteristic (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Marion Jeannin: On smooth integration of p-nilpotent Lie algebras in positive characteristic (Seminar, Algebra & Geometry)

Josefien Kuijper: Spherical scissors congruence as spectral Hopf algebra

3 Sep

Seminar, Algebra & Geometry

Wednesday 2025-09-03, 13:15 - 14:15

Participating: Josefien Kuijper (University of Toronto)

Location: KTH, 3418

2025-09-03T13:15:00.000+02:00 2025-09-03T14:15:00.000+02:00 Josefien Kuijper: Spherical scissors congruence as spectral Hopf algebra (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Josefien Kuijper: Spherical scissors congruence as spectral Hopf algebra (Seminar, Algebra & Geometry)

Aleksander Shmakov: Towards mixed motivic L-functions and conjectures beyond Beilinson

10 Sep

Seminar, Algebra & Geometry

Wednesday 2025-09-10, 13:15 - 14:15

Participating: Aleksander Shmakov (SU)

Location: Albano, Cramér room

2025-09-10T13:15:00.000+02:00 2025-09-10T14:15:00.000+02:00 Aleksander Shmakov: Towards mixed motivic L-functions and conjectures beyond Beilinson (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Aleksander Shmakov: Towards mixed motivic L-functions and conjectures beyond Beilinson (Seminar, Algebra & Geometry)

Richárd Rimányi: 3d mirror symmetry in (elliptic) enumerative geometry

15 Sep

Seminar, Algebra & Geometry

Monday 2025-09-15, 13:15 - 14:15

Participating: Richárd Rimányi (UNC Chapel Hill)

Location: Albano, Cramér room

2025-09-15T13:15:00.000+02:00 2025-09-15T14:15:00.000+02:00 Richárd Rimányi: 3d mirror symmetry in (elliptic) enumerative geometry (Seminar, Algebra & Geometry) Albano, Cramér room (KTH, Stockholm, Sweden)Richárd Rimányi: 3d mirror symmetry in (elliptic) enumerative geometry (Seminar, Algebra & Geometry)

Fred Diamond: Effective and minimal cones of weights for Hilbert modular forms

19 Sep

Seminar, Algebra & Geometry

Friday 2025-09-19, 10:15 - 11:15

Participating: Fred Diamond (King's College London)

Location: Albano, Kovalevsky room

2025-09-19T10:15:00.000+02:00 2025-09-19T11:15:00.000+02:00 Fred Diamond: Effective and minimal cones of weights for Hilbert modular forms (Seminar, Algebra & Geometry) Albano, Kovalevsky room (KTH, Stockholm, Sweden)Fred Diamond: Effective and minimal cones of weights for Hilbert modular forms (Seminar, Algebra & Geometry)

Thomas Wennink: Weight graded pieces of the cohomology of moduli spaces of pointed smooth curves

1 Oct

Seminar, Algebra & Geometry

Wednesday 2025-10-01, 13:15 - 14:15

Participating: Thomas Wennink (SU)

Location: KTH, 3418

2025-10-01T13:15:00.000+02:00 2025-10-01T14:15:00.000+02:00 Thomas Wennink: Weight graded pieces of the cohomology of moduli spaces of pointed smooth curves (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Thomas Wennink: Weight graded pieces of the cohomology of moduli spaces of pointed smooth curves (Seminar, Algebra & Geometry)

Mayuko Yamashita: A merger of elliptic cohomology and global categorical symmetries

8 Oct

Seminar, Algebra & Geometry

Wednesday 2025-10-08, 13:15 - 14:15

Location: SU, Cramér room

2025-10-08T13:15:00.000+02:00 2025-10-08T14:15:00.000+02:00 Mayuko Yamashita: A merger of elliptic cohomology and global categorical symmetries (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Mayuko Yamashita: A merger of elliptic cohomology and global categorical symmetries (Seminar, Algebra & Geometry)

Ilya Smirnov: Singularities of square-free supported polynomials

15 Oct

Seminar, Algebra & Geometry

Wednesday 2025-10-15, 13:15 - 14:15

Participating: Ilya Smirnov (BCAM)

Location: KTH, 3418

2025-10-15T13:15:00.000+02:00 2025-10-15T14:15:00.000+02:00 Ilya Smirnov: Singularities of square-free supported polynomials (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Ilya Smirnov: Singularities of square-free supported polynomials (Seminar, Algebra & Geometry)

Eric Ahlqvist: Wild Stacky Modifications

22 Oct

Seminar, Algebra & Geometry

Wednesday 2025-10-22, 13:15 - 14:15

Participating: Eric Ahlqvist (SU)

Location: SU, Cramér room

2025-10-22T13:15:00.000+02:00 2025-10-22T14:15:00.000+02:00 Eric Ahlqvist: Wild Stacky Modifications (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Eric Ahlqvist: Wild Stacky Modifications (Seminar, Algebra & Geometry)

Olivier Taïbi: Unimodular lattices and the cuspidal cohomology of GL_n(Z)

29 Oct

Seminar, Algebra & Geometry

Wednesday 2025-10-29, 13:15 - 14:15

Participating: Olivier Taïbi (Lyon)

Location: KTH, 3418

2025-10-29T13:15:00.000+01:00 2025-10-29T14:15:00.000+01:00 Olivier Taïbi: Unimodular lattices and the cuspidal cohomology of GL_n(Z) (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Olivier Taïbi: Unimodular lattices and the cuspidal cohomology of GL_n(Z) (Seminar, Algebra & Geometry)

Séverin Philip: The obstruction to semi-stable reduction for abelian varieties

5 Nov

Seminar, Algebra & Geometry

Wednesday 2025-11-05, 13:15 - 14:15

Participating: Séverin Philip (SU)

Location: SU, Cramér room

2025-11-05T13:15:00.000+01:00 2025-11-05T14:15:00.000+01:00 Séverin Philip: The obstruction to semi-stable reduction for abelian varieties (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Séverin Philip: The obstruction to semi-stable reduction for abelian varieties (Seminar, Algebra & Geometry)

Ville Nordström: A decomposition theorem for the Hochschild homology of symmetric powers of dg categories

12 Nov

Seminar, Algebra & Geometry

Wednesday 2025-11-12, 13:15 - 14:15

Participating: Ville Nordström (Aarhus)

Location: KTH, 3418

2025-11-12T13:15:00.000+01:00 2025-11-12T14:15:00.000+01:00 Ville Nordström: A decomposition theorem for the Hochschild homology of symmetric powers of dg categories (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Ville Nordström: A decomposition theorem for the Hochschild homology of symmetric powers of dg categories (Seminar, Algebra & Geometry)

Jeroen Hekking: On ideals in derived geometries

19 Nov

Seminar, Algebra & Geometry

Wednesday 2025-11-19, 13:15 - 14:15

Participating: Jeroen Hekking (Regensburg)

Location: SU, Cramér room

2025-11-19T13:15:00.000+01:00 2025-11-19T14:15:00.000+01:00 Jeroen Hekking: On ideals in derived geometries (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Jeroen Hekking: On ideals in derived geometries (Seminar, Algebra & Geometry)

Georg Oberdieck: Gromov–Witten theory of K3 surfaces

25 Nov

Seminar, Algebra & Geometry

Tuesday 2025-11-25, 13:15 - 14:15

Participating: Georg Oberdieck (Heidelberg / KTH)

Location: SU, Cramér room

2025-11-25T13:15:00.000+01:00 2025-11-25T14:15:00.000+01:00 Georg Oberdieck: Gromov–Witten theory of K3 surfaces (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Georg Oberdieck: Gromov–Witten theory of K3 surfaces (Seminar, Algebra & Geometry)

Solomiya Mizyuk: Virtual invariants of Quot schemes of points on threefolds

26 Nov

Seminar, Algebra & Geometry

Wednesday 2025-11-26, 13:15 - 14:15

Participating: Solomiya Mizyuk (SISSA)

Location: KTH, 3418

2025-11-26T13:15:00.000+01:00 2025-11-26T14:15:00.000+01:00 Solomiya Mizyuk: Virtual invariants of Quot schemes of points on threefolds (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Solomiya Mizyuk: Virtual invariants of Quot schemes of points on threefolds (Seminar, Algebra & Geometry)

Alexei Piskunov: Geometry of Relative Compactified Jacobians on Bielliptic Surfaces

10 Dec

Seminar, Algebra & Geometry

Wednesday 2025-12-10, 10:00 - 11:00

Participating: Alexei Piskunov (Technion)

Location: SU, Cramér room

2025-12-10T10:00:00.000+01:00 2025-12-10T11:00:00.000+01:00 Alexei Piskunov: Geometry of Relative Compactified Jacobians on Bielliptic Surfaces (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Alexei Piskunov: Geometry of Relative Compactified Jacobians on Bielliptic Surfaces (Seminar, Algebra & Geometry)

Howard Nuer: The Weak Brill–Noether Problem on Abelian surfaces

10 Dec

Seminar, Algebra & Geometry

Wednesday 2025-12-10, 13:15 - 14:15

Participating: Howard Nuer (Technion)

Location: KTH, 3418

2025-12-10T13:15:00.000+01:00 2025-12-10T14:15:00.000+01:00 Howard Nuer: The Weak Brill–Noether Problem on Abelian surfaces (Seminar, Algebra & Geometry) KTH, 3418 (KTH, Stockholm, Sweden)Howard Nuer: The Weak Brill–Noether Problem on Abelian surfaces (Seminar, Algebra & Geometry)

Oscar Harr: Lefschetz–Nielsen fixed point theory in dualizable categories

17 Dec

Seminar, Algebra & Geometry

Wednesday 2025-12-17, 13:15 - 14:15

Participating: Oscar Harr (SU)

Location: SU, Cramér room

2025-12-17T13:15:00.000+01:00 2025-12-17T14:15:00.000+01:00 Oscar Harr: Lefschetz–Nielsen fixed point theory in dualizable categories (Seminar, Algebra & Geometry) SU, Cramér room (KTH, Stockholm, Sweden)Oscar Harr: Lefschetz–Nielsen fixed point theory in dualizable categories (Seminar, Algebra & Geometry)