Past Conferences

• Warsaw (Poland), Jun. 2026, SAMSA 2026 (Workshop): Series, Automata, Matrices, Symbolic dynamics, and their Applications.

  Invited Survey Talk: The Status of the Ambiguity Hierarchy of Weighted Automata over Fields, and
  Invited Tutorial Talk: Algebraic Methods for the Ambiguity Hierarchy.
• Ljubljana (Slovenia), Jun. 2026, 109th Workshop on General Algebra (AAA 109) and Semigroups and Automata in Ljubljana (SAL 2026). (Coorganizer)
• Plzeň (Czechia), Feb. 2026, CSASC 2026 - Joint Meeting & Conference of the Czech, Slovenian, Austrian, Slovak & Catalan Mathematical Societies, Workshop on Representation Theory and Commutative and non-Commutative Algebra. (Workshop Coorganizer)
• Salzburg (Austria), Sep. 2025, 26th Central European Number Theory Conference 2025.

  Invited Talk: Applications of unit equations to linear groups and weighted automata.
• Linz (Austria), Sep. 2025, ÖMG/DMV Tagung 2025 (Joint Meeting of the Austrian and German Mathematical Societies).
• Chęciny (Poland), Jul. 2025, Weighted Automata Rock. Problem solving workshop on Series, Automata, Matrices, Symbolic dynamics, and their Applications at the European Centre for Geological Education, organized by the Faculty of Mathematics, Informatics and Mechanics, University of Warsaw.
• Graz (Austria), Jul. 2025, Conference on Rings and Polynomials 2025.

  Talk: Infinite direct-sum decompositions via a monoid-theoretical approach.
• Portorož (Slovenia), Jun. 2025, LAW'25 — 9th Linear Algebra Workshop.

  Talk: An arithmetic inverse result for semigroups of invertible matrices.
• Banff (Canada), May 2025, NC function theory: The non-Commutative Frontier of Analysis and Algebra (BIRS 5-day workshop).

  Talk: Noncommutative rational series.
• Bordeaux (France), Sep. 2024, Jewels of Automata Theory 2024 (jointly scheduled with Highlights of Logic, Games and Automata 2024).

  Invited Talk: “Weighted Automata over Fields - Determinization and related problems”.
• Sevilla (Spain), Jul. 2024, 2024 European Congress of Mathematics.

  Talk: “A monoid-theoretical approach to infinite direct-sum decompositions of modules” in the mini-symposium on Rings, Modules, and Factorizations.
• Warlity Wielkie (Poland), Jun. 2024, InfAut 2024 - Workshop on Infinite-State Systems.

  Invited Talk: “Weighted automata determinization over fields”.
• Anglet (France), Jun. 2024, De rerum natura & Functional Equations and Interactions.

  Invited Talk: “Gaps in the growth of coefficients of Mahler functions”.
• Graz (Austria), Sep. 2023, ÖMG Tagung 2023 (Meeting of the Austrian Mathematical Society).

  Plenary Talk: “On factorizations in noncommutative rings”.
• Lens (France), Aug. 2023, NCRA VIII - Noncommutative Rings and their Applications.
• Incheon (South Korea), Aug. 2023, 9th China-Japan-Korea International Conference on Ring and Module Theory.

  Talk: “On noncommutative bounded factorization domains and prime rings”.
• Graz (Austria), Jul. 2023, Conference on Rings and Factorizations 2023. (Coorganizer)
• Boston (USA), Jun. 2023, Thirty-Eighth Annual ACM/IEEE Symposium on Logic in Computer Science (LICS).

  Talk: “Computing the linear hull: Deciding Deterministic? and Unambiguous? for weighted automata over fields”.
• Tarbiat Modares University (Teheran, Iran)/Online, May 2022, International Conference on Noncommutative Algebra and its Applications.

  Invited Talk: “On some factorization questions in noncommutative noetherian domains”.
• Passau (Germany)/Online, Sep. 2021, DMV-ÖMG Annual Conference 2021.

  Talk: “Noncommutative rational Pólya series”.
• Graz (Austria)/Hybrid, Jul. 2021, Conference on Rings and Polynomials.

  Talk: “On noncommutative bounded factorization domains”.
• Lens (France)/Online, Jul. 2021, Noncommutative Rings and their Applications, VII.

  Talk: “Noncommutative rational Pólya series”.
• Washington, DC (USA)/Online, Jan. 2021, 2021 Joint Mathematics Meeting.

  Talk: “Monoids of graph agglomerations” in the special session on Commutative rings: ideals, modules and factorizations.
• Sharjah (United Arab Emirates), Feb. 2020, 3rd International Conference on Mathematics and Statistics, AUS-ICMS.

  Talk: “Locally free cancellation for definite quaternion algebras” in the special session on Rings, Monoids and Module Theory.
• Honolulu, Hawaii (USA), Mar. 2019, AMS Spring Central and Western Joint Sectional Meeting.

  Talk: “Class groups of cluster algebras” in the special session on Factorization and Arithmetic Properties of Integral Domains and Monoids.
• Graz (Austria), Feb. 2018, Conference on Rings and Factorizations.

  Plenary Talk: “Non-unique factorizations in bounded hereditary noetherian prime rings”.
• University of Maine, Orono, Maine (USA), Oct. 2017, Maine-Québec Number Theory Conference 2017.

  Talk: “Arithmetical invariants of local quaternion orders”.
• Philadelphia, Pennsylvania (USA), Jul. 2017, Algebra Extravaganza.

  Poster: “Non-unique factorizations in (some) noncommutative rings”.
• Graz (Austria), Jul. 2016, Conference on Rings and Polynomials.

  Talk: “A transfer homomorphism for factorizations in bounded hereditary Noetherian prime rings”.
• Graz (Austria), Jan. 2016, Combinatorial and Additive Number Theory 2016. (Coorganizer)
• Lens (France), Jun. 2015, Noncommutative rings and their Applications, IV.

  Talk: “Every abelian group is the class group of a simple Dedekind domain”.
• San Antonio, Texas (USA), Jan. 2015, AMS/MAA Joint Mathematics Meeting 2015.

  Talk: “A semigroup-theoretical view of direct-sum decompositions over HNP rings” in the special session Factorization Theory and Its Applications.
• Graz (Austria), Sep. 2014, Arithmetic and Ideal Theory of Rings and Semigroups. (Coorganizer)
• St. Catharines, Ontario (Canada), Jul. 2014, Brock International Conference on Groups, Rings and Group Rings.

  Talk: “Factorization theory in maximal orders in central simple algebras”.
• Abbazia di Spineto, Sarteano (Italy), Jun. 2014, Algebraic Structures and Their Applications.

  Talk: “A semigroup-theoretical view of direct-sum decompositions and associated combinatorial problems”.
• Innsbruck (Austria), Sep. 2013, 18th ÖMG Congress and Annual DMV Meeting.

  Talk: “Non-unique factorizations in maximal orders in central simple algebras”.
• Będlewo (Poland), Jul. 2013, Classical Aspects of Ring Theory and Module Theory.

  Talk: “Sets of lengths in maximal orders in central simple algebras”.
• Lens (France), Jul. 2013, Noncommutative rings and their Applications, III.

  Talk: “Sets of lengths in maximal orders in central simple algebras”.
• Graz (Austria), Dec. 2012, Conference on Commutative Rings, Integer-valued Polynomials and Polynomial Functions.

  Talk: “Factorization in a commutative subring of the 2×2 matrices over a PID”.
• Bressanone (Italy), Jun. 2012, Commutative Rings and their Modules.

  Talk: “The set of distances in maximal orders of central simple algebras over number fields”.
• Budapest (Hungary), Aug. 2011, Paul Turán Memorial Conference.

  Talk: “On the Davenport constant of a finite abelian group”.