The Open Seminar provides a platform for students
and researchers to present their work, discuss new ideas,
and explore a broad range of mathematical topics in a
collaborative and friendly environment.
The seminar is hosted by
the School of Mathematical Sciences at Hebei Normal
University (HebNU) and organized by Salvatore Tringali (contact details)
and Liping Yuan. It features a mix of guests and members
of the local academic community as speakers.
Unless differently specified, all talks are
Thursday 4:30–5:30 PM (Beijing time) · HebNU School of Mathematical Sciences, Room D203 or D204
To enable participants from around the world,
we stream the seminar on Zoom via the link:
https://us06web.zoom.us/j/86763384947?pwd=qXhOzOcHvaaiw2jqADI8iqNavdgm14.1
To receive announcements about upcoming talks, please send an email to one of the organizers.
Prospective speakers are strongly encouraged to submit both the TeX file
and a PDF version of their abstract, including a short academic bio,
using the template available here.
Spring–Summer 2026
Thursday, March 5, 2026 · 4:30–5:30 PM (Beijing time) · in person
Mikko KORHONEN ·
Mathematics Research Centre, Tampere University (Tampere, Finland)
Thursday, March 12, 2026 · 4:30–5:30 PM (Beijing time) · online
Dein WONG(*) ·
School of Mathematics, China Univ. of Mining and Technology (Xuzhou, China)
On automorphism groups of power semigroups over numerical semigroups
(
abstract ·
slides)
(*) Due to a last-minute change of programme,
the talk was given by Songnian XU,
a 3rd-year PhD student of Prof. Wong at the China Univ. of Mining and Technology.
Thursday, March 19, 2026 · 5:00–6:00 PM (Beijing time) · in person
Weihao YAN ·
School of Mathematical Sciences, Hebei Normal Univ. (Shijiazhuang, China)
Torsion groups and the Bienvenu–Geroldinger conjecture
(
abstract ·
slides)
Monday, March 23, 2026 · 10:30–11:30 AM (Beijing time) · in person
Alexey GALT ·
Sobolev Institute of Mathematics (Novosibirsk, Russia)
The structure of the normalizers of maximal tori in groups of Lie type
(
abstract ·
slides)
Friday, April 3, 2026 · 4:30–5:30 PM (Beijing time) · in person
Kerou WEN ·
School of Mathematical Sciences, Hebei Normal Univ. (Shijiazhuang, China)
On the automorphisms of numerical power semigroups
(
abstract ·
slides)
April 9, 2026 · 4:30–5:30 PM (Beijing time) · online
Balint RAGO · Dept. of Mathematics and Scientific Computing, Univ. of Graz (Graz, Austria)
On an isomorphism problem for reduced finitary power monoids
(
abstract
·
slides)
April 14, 2026 · 4:40–5:40 PM (Beijing time) · in person
Vladislav KABANOV
· School of Mathematical Sciences, Hebei Normal Univ. (Shijiazhuang, China)
Vladislav KABANOV
· Krasovskii Inst. of Mathematics and Mechanics (Yekaterinburg, Russia)
Divisible design graphs derived from collections of affine designs
(
abstract
·
slides)
April 14, 2026 · 5:40–6:40 PM (Beijing time) · in person
Ilia PONOMARENKO ·
St. Petersburg Dept. of Steklov Inst. of Mathematics (St. Petersburg, Russia)
The Weisfeiler–Leman dimension of graphs, old and new results
(
abstract
·
slides)
April 16, 2026 · 4:30–5:30 PM (Beijing time) · in person
Yi Lin XIE ·
School of Mathematical Sciences, Hebei Normal Univ. (Shijiazhuang, China)
On the minimal degree of finite permutation groups
(
abstract ·
slides)
April 22, 2026 · 10:30‑11:30 PM (Beijing time) · online
Zachary MESYAN ·
Dept. of Mathematics, University of Colorado (Colorado Spring, USA)
April 30, 2026 · 3:00–4:00 PM (Beijing time) · online
Andreas REINHART ·
Dept. of Mathematics and Scientific Computing, Univ. of Graz (Graz, Austria)
May 7, 2026 · 3:00–4:00 PM (Beijing time) · online
Paolo LEONETTI ·
Dept. of Economics, University of Insubria (Varese, Italy)
May 14, 2026 · 4:30–5:30 PM (Beijing time) · in person
Gurinder SINGH ·
School of Mathematical Sciences, Hebei Normal Univ. (Shijiazhuang, China)
A proof of the \(J\)-generalization of the Göllnitz–Gordon–Andrews identities via commutative algebra
(
abstract ·
slides)
May 19, 2026 · 4:40–5:40 PM (Beijing time) · in person
Grigorii RIABOV ·
Sobolev Institute of Mathematics (Novosibirsk, Russia)
May 28, 2026 · 3:00–4:00 PM (Beijing time) · online/in person
Free slot ·
Fall–Winter 2025
John Doe · University of Joy, Serendipity
Recent trends in the theory of summer holidays
(slides)
Mario Rossi · Paramount Institute of Gattology, Venus
Cats and the maximum meowing principle
(slides)