Discrete Mathematics Working Group (Arbeitsgemeinschaft Diskrete Mathematik, AGDM)
Info: The AGDM seminar is a joint seminar of the University of Vienna and TU Wien. In winter semesters, we meet on Tuesdays from 15:00 to 16:30 at the University of Vienna. In summer semesters, the seminars are held in TU Wien.
From 2025, we will be using a new mailing-list to advertise the seminar. You can register here.
Place: TU Wien (Freihaus, Wiedner Hauptstr. 8-10, 1040 Wien): Room DA 08 B19 (Dissertantenzimmer), 8th floor, Tower A (green)
Time: Tuesday, 15:15-16:45
Next talk
| Date: |
15.04.2025 |
| Title: |
On the Unexpected Connections in the Arithmetic Properties of POND and PEND Partitions
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| Speaker: |
James Sellers (University of Minnesota Duluth) |
| Abstract: |
Recently, Ballantine and Welch considered two classes of integer partitions which they labeled POND and PEND partitions. These are integer partitions wherein the odd parts (respectively, the even parts) *cannot* be distinct. In recent work, I studied these two types of partitions from an arithmetic perspective and proved infinite families of mod 3 congruences satisfied by the two corresponding enumerating functions. I will talk about the generating functions for these enumerating functions, and I will also highlight the elementary proofs that I utilized.
In the latter portion of the talk, I will discuss unexpected connections between these divisibility properties for POND and PEND partitions by considering modified versions of the generating functions in question and relating these new generating functions in a natural way via Atkin-Lehner involutions. This part of the talk is joint work with Nicolas Smoot (University of Vienna).
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Code of conduct
Maintaining a respectful environment is essential to fostering meaningful dialogue and intellectual growth. Participants are expected to refrain from any form of disrespectful or inappropriate behaviour, including offensive comments, harassment, or disruptive conduct. Questions and contributions should be constructive, relevant to the topic, and posed in a professional manner that encourages healthy academic exchange. Harassment of any kind—whether verbal, non-verbal, or physical—will not be tolerated, and all attendees are urged to uphold these principles to ensure a safe and welcoming atmosphere for everyone.
Upcoming talks
| 22.04.2025 | | No talk (spring break) |
| 29.04.2025 | | No talk (spring break) |
| 08.05.2025 | Krishna Alladi | Alamoudi’s bijective proof of Andrews’ refinement of the Alladi-Schur theorem |
| 13.05.2025 | Fabian Levcian |
| 20.05.2025 | Matjaž Konvalinka |
| 27.05.2025 | Philipp Beltran | Scaling limits of multitype Bienaymé trees |
| 03.06.2025 | |
| 10.06.2025 | |
| 17.06.2025 | |
| 24.06.2025 | Alessandro Iraci |
Talks in the past years
Talks of years 2005 - 2024
Past talks of this year
| Datum: |
08.04.2025 |
| Titel: |
Dual transform, PSD codes and self-dual bent functions |
| Speaker: |
Stefka Bouyuklieva (University of Veliko Tarnovo) |
| Datum: |
01.04.2025 |
| Titel: |
Newton polytopes of some symmetric polynomials |
| Speaker: |
Candice Zhang 张旭彤 (Chinese Academy of Sciences, Beijing) |
| Datum: |
18.03.2025 |
| Titel: |
Combinatorial problems arising from representation theory of $GL_n$ over a $p$-adic field |
| Speaker: |
Erez Lapid (Weizmann Institute of Science) |
| Datum: |
11.03.2025 |
| Titel: |
Hall-Littlewood polynomials, affine Schubert series, and lattice enumeration |
| Speaker: |
Christopher Voll (Universität Bielefeld) |
| Datum: |
04.03.2025 |
| Titel: |
The number of monotone trapezoids with prescribed bottom row |
| Speaker: |
Ilse Fischer (Universität Wien) |
| Datum: |
28.01.2025 |
| Titel: |
Cohomology of perfect Lie algebras and partitions |
| Speaker: |
Dietrich Burde (Universität Wien) |
| Datum: |
21.01.2025 |
| Titel: |
Rook equivalence and a multisum extension of the Sears $_4\phi_3$ transformation |
| Speaker: |
Michael Schlosser (Universität Wien) |
| Datum: |
14.01.2025 |
| Titel: |
Short presentations and posters |
| Speaker: |
Students |
| Datum: |
07.01.2025 |
| Titel: |
Separated variables on plane algebraic curves |
| Speaker: |
Manfred Buchacher (JKU Linz) |
| Datum: |
17.12.2024 |
| Titel: |
Murnaghan–Nakayama rlies for symplectic, orthogonal and orthosymplectic Schur functions |
| Speaker: |
Nishu Kumari (Universität Wien) |
| Datum: |
10.12.2024 |
| Titel: |
Number systems and fractals |
| Speaker: |
Lucía Rossi (TU Wien) |
| Datum: |
03.12.2024 |
| Titel: |
Cluster structures on spinor helicity and momentum twistor varieties |
| Speaker: |
Jianrong Li (Universität Wien) |
| Datum: |
26.11.2024 |
| Titel: |
An Unexpected Symmetry on Graphs |
| Speaker: |
Florian Fürsinn (Universität Wien) |
| Datum: |
19.11.2024 |
| Titel: |
Phase transitions of block-weighted planar maps |
| Speaker: |
Zéphyr Salvy (TU Wien) |
| Datum: |
12.11.2024 |
| Titel: |
Polyominoes from operators on symmetric functions |
| Speaker: |
Marino Romero (Universität Wien) |
| Datum: |
05.11.2024 |
| Titel: |
Folding lemma and its applications in Number Theory |
| Speaker: |
Nikita Shliga (La Trobe University Melbourne) |
| Datum: |
29.10.2024 |
| Titel: |
Growth diagram proofs for the Littlewood identities |
| Speaker: |
Florian Schreier-Aigner (Universität Wien) |
| Datum: |
22.10.2024 |
| Titel: |
A central limit theorem for a card shuffling problem |
| Speaker: |
Shane Chern (Universität Wien) |
| Datum: |
15.10.2024 |
| Titel: |
$p(5n+4)$ again! Parity bias and it's unintended arithmetic consequences |
| Speaker: |
Manosij Ghosh Dastidar (TU Wien) |
| Datum: |
08.10.2024 |
| Titel: |
Lattice points and rational $q$-Catalan numbers |
| Speaker: |
Drew Armstrong (University of Miami) |