COmbinatorics Seminar for Everyone (COSE)
This is a reading seminar open to everyone, especially bachelor, master and PhD students. The topic changes every year/semester. It includes free coffee breaks.
If you are interested in participating, please send an email to cult-owner@lists.dm.unipi.it, bring your coffee cup/mug/water bottle, and be ready to give a talk!
In the second semester of this year the topic of the seminar is the "Sandpile model". We will take the topics mainly from the book by Corry and Perkinson and from an article of Cori and Le Borgne. Though very much related to the content of the first semester, this seminar can be followed as well by anyone that did not participate in the first semester.
[CP] Divisors and Sandpiles: An Introduction to Chip-Firing, 2010
[CL] Cori, Le Borgne, "The sandpile model and Tutte polynomials", 2003
| DATE | TIME | ROOM | SPEAKER | TITLE | REFERENCES |
|---|---|---|---|---|---|
| 03/03/2025 | 11:00-13:00 | Saletta riunioni | Michele D'Adderio | Introduction to the sandpile model | [CP] Section 6.1 |
| 17/03/2025 | 11:00-13:00 | Aula seminari | Alessandro Fenu | Stabilization and Reduced Laplacian | [CP] Sections 6.2-6.4 |
| 31/03/2025 | 11:00-13:00 | Aula seminari | Giovanni Interdonato | The sandpile group | [CP] Section 6.5 |
| 14/04/2025 | 11:00-13:00 | Aula seminari | Roberto Riccardi | Matrix-tree theorem | [CP] Sections 9.1-9.2 |
| 12/05/2025 | 11:00-13:00 | Aula seminari | Alessandro Tedeschi | Dhar's burning algorithm for recurrent configurations | [CP] Section 7 |
| 26/05/2025 | 11:00-13:00 | Aula seminari | Lorenzo Noe' | Cori-Le Borgne bijection between spanning trees and recurrent configurations | [CL] Full article |
In the first semester of this year the topic of the seminar is the "Dollar game". We will follow mainly the book by Corry and Perkinson.
[CP] Divisors and Sandpiles: An Introduction to Chip-Firing, 2010
| DATE | TIME | ROOM | SPEAKER | TITLE | REFERENCES |
|---|---|---|---|---|---|
| 03/10/2024 | 11:00-13:00 | Aula seminari | Michele D'Adderio | Introduction to the dollar game | [CP] Sections 1.1 and 1.2 |
| 17/10/2024 | 11:00-13:00 | Aula seminari | Cristofer Villani | Picard and Jacobian groups. Discrete Laplacian. | [CP] Sections 1.3 and 2.1 |
| 31/10/2024 | 11:00-13:00 | Aula seminari | Pietro Gualdi | Reduced Laplacian and structure of Picard group | [CP] Sections 2.2 and 2.4 |
| 14/11/2024 | 11:00-13:00 | Aula seminari | Simone Foti | Complete linear systems and a greedy algorithm | [CP] Sections 2.3 and 3.1 |
| 28/11/2024 | 11:00-13:00 | Aula seminari | Roberto Maria Tocco | q-reduced divisors and superstable configurations | [CP] Sections 3.2 and 3.3 |
| 12/12/2024 | 11:00-13:00 | Aula seminari | Lorenzo Noè | Dhar's burning algorithm and the debt-reduction trick | [CP] Section 3.4 |