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Mini-courses (Week 1 & 2)
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Planning
Week
Mon. 13
Tue. 14
Wed. 15
Thu. 16
Fri. 17
Sat. 18
Sun. 19
Mon. 20
Tue. 21
Wed. 22
Thu. 23
Fri. 24
Sat. 25
Sun. 26
Mon. 27
Tue. 28
Wed. 29
Thu. 30
Fri. 01
List
Mon. 13
Tue. 14
Wed. 15
Thu. 16
Fri. 17
Sat. 18
Sun. 19
Mon. 20
Tue. 21
Wed. 22
Thu. 23
Fri. 24
Sat. 25
Sun. 26
Mon. 27
Tue. 28
Wed. 29
Thu. 30
Fri. 01
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
Welcome opening
9:00 - 12:30 (3h30)
Welcome opening
Alexander HULPKE 1
14:00 - 15:00 (1h)
Alexander HULPKE 1
Computational group theory, cohomology of groups and topological methods
Alexander HULPKE 2
15:15 - 16:15 (1h)
Alexander HULPKE 2
Computational group theory, cohomology of groups and topological methods
Renaud COULANGEON 1
16:30 - 17:30 (1h)
Renaud COULANGEON 1
Lattices, Perfects lattices, Voronoi reduction theory, modular forms, computations of isometries and automorphisms
Renaud COULANGEON 2
9:00 - 10:00 (1h)
Renaud COULANGEON 2
Lattices, Perfects lattices, Voronoi reduction theory, modular forms, computations of isometries and automorphisms
Graham ELLIS 1
10:15 - 11:15 (1h)
Graham ELLIS 1
Computational group theory, cohomology of groups and topological methods
Graham ELLIS 2
11:30 - 12:30 (1h)
Graham ELLIS 2
Computational group theory, cohomology of groups and topological methods
Lunch
12:30 - 14:00 (1h30)
Lunch
Gabriele NEBE 1 (zoom)
14:00 - 15:00 (1h)
Gabriele NEBE 1 (zoom)
Lattices, Perfects lattices, Voronoi reduction theory, modular forms, computations of isometries and automorphisms
Alexander HULPKE 3
15:15 - 16:15 (1h)
Alexander HULPKE 3
Computational group theory, cohomology of groups and topological methods
Graham ELLIS 3
16:30 - 17:30 (1h)
Graham ELLIS 3
Computational group theory, cohomology of groups and topological methods
Bill ALLOMBERT
9:00 - 10:45 (1h45)
Bill ALLOMBERT
Introduction to PARI/GP (with 'laptop classroom'; intro+practical work)
Herbert GANGL
11:00 - 12:30 (1h30)
Herbert GANGL
Illustrating the mathematics of COGENT: A hyperbolic angle
Lunch
12:30 - 14:00 (1h30)
Lunch
Bettina EICK 1
14:00 - 15:00 (1h)
Bettina EICK 1
Computational group theory, cohomology of groups and topological methods
Bettina EICK 2
15:15 - 16:15 (1h)
Bettina EICK 2
Computational group theory, cohomology of groups and topological methods
Graham ELLIS 4
16:30 - 17:30 (1h)
Graham ELLIS 4
Computational group theory, cohomology of groups and topological methods
Bettina EICK 3
9:00 - 10:00 (1h)
Bettina EICK 3
Computational group theory, cohomology of groups and topological methods
Bettina EICK 4
10:15 - 11:15 (1h)
Bettina EICK 4
Computational group theory, cohomology of groups and topological methods
Alexander HULPKE 4
11:30 - 12:30 (1h)
Alexander HULPKE 4
Computational group theory, cohomology of groups and topological methods
Lunch
12:30 - 14:00 (1h30)
Lunch
Phong NGUYEN 1
14:00 - 15:00 (1h)
Phong NGUYEN 1
Recent progress on lattices's computations
Phong NGUYEN 2
15:15 - 16:15 (1h)
Phong NGUYEN 2
Recent progress on lattices's computations
Alexander HULPKE 5
16:30 - 17:30 (1h)
Alexander HULPKE 5
Computational group theory, cohomology of groups and topological methods
Bettina EICK 5
9:00 - 10:00 (1h)
Bettina EICK 5
Computational group theory, cohomology of groups and topological methods
Graham ELLIS 5
10:15 - 11:15 (1h)
Graham ELLIS 5
Computational group theory, cohomology of groups and topological methods
Haluk SENGUN 1
11:30 - 12:30 (1h)
Haluk SENGUN 1
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Welcome opening
10:00 - 12:30 (2h30)
Welcome opening
Haluk SENGUN 2 (zoom)
14:00 - 15:00 (1h)
Haluk SENGUN 2 (zoom)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Paul GUNNELLS 1 (zoom, Philippe on-site)
15:15 - 16:15 (1h)
Paul GUNNELLS 1 (zoom, Philippe on-site)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Paul GUNNELLS 2 (zoom)
16:30 - 17:30 (1h)
Paul GUNNELLS 2 (zoom)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Aurel PAGE 1
9:00 - 10:00 (1h)
Aurel PAGE 1
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Aurel PAGE 2
10:15 - 11:15 (1h)
Aurel PAGE 2
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Peter PATZT 1
11:30 - 12:30 (1h)
Peter PATZT 1
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Lunch
12:30 - 14:00 (1h30)
Lunch
Paul GUNNELLS 3 (zoom, Philippe on-site)
14:00 - 15:00 (1h)
Paul GUNNELLS 3 (zoom, Philippe on-site)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Jennifer WILSON 1 (zoom, Peter on-site)
15:15 - 16:15 (1h)
Jennifer WILSON 1 (zoom, Peter on-site)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Jennifer WILSON 2 (zoom, Peter on-site)
16:30 - 17:30 (1h)
Jennifer WILSON 2 (zoom, Peter on-site)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Peter PATZT 2 (exercice and Q&A session)
9:00 - 10:00 (1h)
Peter PATZT 2 (exercice and Q&A session)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Peter PATZT 2 (exercice and Q&A session)
10:15 - 11:15 (1h)
Peter PATZT 2 (exercice and Q&A session)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Philippe ELBAZ 1
11:30 - 12:30 (1h)
Philippe ELBAZ 1
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Dinner
12:30 - 14:00 (1h30)
Dinner
Paul GUNNELLS 4 (zoom, Philippe on-site)
14:00 - 15:00 (1h)
Paul GUNNELLS 4 (zoom, Philippe on-site)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Philippe ELBAZ 2
15:15 - 16:15 (1h)
Philippe ELBAZ 2
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Jennifer WILSON 3 (zoom, Peter on-site)
16:30 - 17:30 (1h)
Jennifer WILSON 3 (zoom, Peter on-site)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Peter PATZT 3
9:00 - 10:00 (1h)
Peter PATZT 3
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Philippe ELBAZ 3
10:15 - 11:15 (1h)
Philippe ELBAZ 3
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Philippe ELBAZ 4
11:30 - 12:30 (1h)
Philippe ELBAZ 4
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Lunch
12:30 - 14:00 (1h30)
Lunch
Paul GUNNELLS 5 (zoom, Philippe on-site)
14:00 - 15:00 (1h)
Paul GUNNELLS 5 (zoom, Philippe on-site)
Cohomology of arithmetic groups and number theory: geometric, asymptotic and computational aspects
Peter PATZT 4 (Jenny present on zoom)
15:15 - 16:15 (1h)
Peter PATZT 4 (Jenny present on zoom)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Peter PATZT / Jennifer WILSON (exercice and Q&A session)
16:30 - 17:30 (1h)
Peter PATZT / Jennifer WILSON (exercice and Q&A session)
High dimensional cohomology of SL_n(Z) and its principal congruence subgroups
Philippe ELBAZ/Paul GUNNELLS
9:30 - 11:00 (1h30)
Philippe ELBAZ/Paul GUNNELLS
Further directions and open problems
Peter PATZT/Jennifer WILSON
11:15 - 12:45 (1h30)
Peter PATZT/Jennifer WILSON
Further directions and open problems
Richard Hill
15:00 - 16:00 (1h)
Richard Hill
Fractional weight modular forms * joint session with COGENT regular seminar * (zoom)
Michael Lipnowski * joint session with COGENT regular seminar * (zoom)
16:00 - 17:00 (1h)
Michael Lipnowski * joint session with COGENT regular seminar * (zoom)
TBA
Haowen Zhang
9:30 - 10:30 (1h)
Haowen Zhang
Brauer-Manin and cohomological obstructions to rational points
Alexander Rahm
11:00 - 12:00 (1h)
Alexander Rahm
Verification of the Quillen conjecture in the rank 2 imaginary quadratic case
Lunch
12:00 - 14:00 (2h)
Lunch
Petru Constantinescu
14:00 - 15:00 (1h)
Petru Constantinescu
On the distribution of modular symbols and cohomology classes
Angelica Babei
15:15 - 16:15 (1h)
Angelica Babei
A family of $\phi$-congruence subgroups of the modular group (zoom)
Zachary Himes
16:15 - 17:15 (1h)
Zachary Himes
On not the rational dualizing module for $\text{Aut}(F_n)$ (zoom)
Lewis Combes
9:30 - 10:30 (1h)
Lewis Combes
Computing Selmer groups attached to mod p Galois representations
Oussama Hamza
11:00 - 12:00 (1h)
Oussama Hamza
Hilbert series and mild groups
Lunch
12:00 - 14:00 (2h)
Lunch
Kieran Child
14:00 - 15:00 (1h)
Kieran Child
Computation of weight 1 modular forms
Kalani Thalagoda
15:15 - 15:45 (30min)
Kalani Thalagoda
Bianchi modular forms (zoom)
Calista Bernard
16:00 - 17:00 (1h)
Calista Bernard
Applications of twisted homology operations for E_n-algebras (zoom)
Tobias Braun
9:30 - 10:30 (1h)
Tobias Braun
Orthogonal Determinants
Leonie Scheeren
11:00 - 12:00 (1h)
Leonie Scheeren
The Voronoi Algorithm for calculating unit groups
Lunch
12:00 - 14:00 (2h)
Lunch
Tobias Moede
14:00 - 15:00 (1h)
Tobias Moede
Coclass theory for nilpotent associative algebras (zoom)
Benjamin Brück
15:00 - 16:00 (1h)
Benjamin Brück
High-dimensional rational cohomology of $\operatorname{SL}_n(\mathbb{Z})$ and $\operatorname{Sp}_{2n}(\mathbb{Z})$ (zoom)
Andrew Putman
16:00 - 17:00 (1h)
Andrew Putman
The Steinberg representation is irreducible (zoom)
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