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Weekly research seminar
Organizers
- dr Łukasz Kubat
- prof. dr hab. Jan Okniński
Information
Thursdays, 12:15 p.m. , room: 5450Research fields
List of talks
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Dec. 4, 2025, 12:15 p.m.
Andrzej Strojnowski (Uniwersytet Warszawski)
O 4-wymiarowych algebrach z dzieleniem
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Nov. 27, 2025, 12:15 p.m.
Daniel Smertnig (University of Ljubljana)
An Arithmetic Inverse Result for Matrix Groups
A classical theorem of Burnside–Schur shows that finitely generated torsion matrix groups are finite. A variant shows that a finitely generated matrix group whose spectrum is finite has a block-triangular structure with finite semigroups in …
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Oct. 30, 2025, 12:15 p.m.
Roksana Słowik (Politechnika Śląska)
Macierze trójkątne o pewnych szczególnych przekątnych
W trakcie referatu przedstawię pewne rezultaty dotyczące faktoryzacji N na N (gdzie N oznacza zbiór liczb naturalnych) macierzy trójkątnych. Wszystkie wyniki łączy to, że pojawiające się w nich macierze posiadają pewne własności związane z główną …
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Oct. 23, 2025, 12:15 p.m.
Robert Gray (University of East Anglia)
Membership problems in braid groups and Artin groups
In this talk I shall present some recent joint work with Carl-Fredrik Nyberg Brodda (KIAS, Seoul), in which we study several natural decision problems in braid groups and Artin groups. The subsemigroup membership problem for …
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Oct. 16, 2025, 12:15 p.m.
Mateusz Woronowicz (Uniwersytet w Białymstoku)
Grupy addytywne pierścieni Hamiltona, a grupy addytywne pierścieni przemiennych
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June 12, 2025, 2:15 p.m.
Leo Margolis (Universidad Autónoma de Madrid)
On the Modular Isomorphism Problem
A series of two lectures (90 minutes each one) Thursday, June 12, 14:15, room 3220 Friday, June 13, 14:15, room 3240 Abstract. Say we are given only the R-algebra structure of a group ring RG …
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June 5, 2025, 1:30 p.m.
António Malheiro (NOVA School of Science and Technology, Lisbon)
Varieties Generated by Plactic-like Monoids: Identities and Representations
Plactic-like monoids — such as the hypoplactic, stalactic, taiga, sylvester, and Baxter monoids — arise naturally in algebraic combinatorics and exhibit rich algebraic behavior in terms of the identities they satisfy and the varieties they …
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May 29, 2025, 12:15 p.m.
Adam Sikora (Uniwersytet Stanu Nowy Jork w Buffalo)
Od niezmienników kwantowych splotów do grup kwantowych i baz kanonicznych
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May 22, 2025, 12:15 p.m.
André Leroy (Artois University)
Polynomial evaluations
We briefly account for various notions of evaluations of polynomials in noncommutative settings. We then concentrate on different types of Ore extensions, with one or more variables. Some presented results generalize classical results and open …
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May 15, 2025, 12:15 p.m.
Tomasz Brzeziński (Swansea University, Uniwersytet w Białymstoku)
Kilka uwag o afinizacji
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Feb. 20, 2025, 12:15 p.m.
Bogdana Oliynyk (Politechnika Śląska)
Locally matrix and locally standard algebras and Steinitz numbers
In this talk, based on joint papers with Oksana Bezushchak, we consider parametrization of locally matrix and locally standard algebras by Steinitz numbers. Glimm showed that every countable-dimensional unital locally matrix algebra is uniquely determined …
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Jan. 23, 2025, 12:15 p.m.
Paola Stefanelli (University of Salento)
Self-distributive structures and reflections to set-theoretic solutions of the Yang–Baxter equation
The Yang–Baxter equation (YBE) is a fundamental equation of mathematical physics that has been extensively studied in the last few years. Alongside it, the reflection equation serves as a significant tool in the theory of …
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Jan. 16, 2025, 12:15 p.m.
Arne Van Antwerpen (University of Ghent)
Non-fixing graphs of skew braces
In this talk, based on joint work with Silvia Properzi, we recall some core concepts of skew braces. Next, we introduce the non-fixing graph of a skew brace, inspired by the conjugacy class graph as …
