AlgNTh – Algebra and Number Theory
Research Group
This is an archived list of talks in our research seminar in previous years. Current seminar program.
Summer Semester 2023
| 16.3.2023 | Amr Al-Maktry (Graz University of Technology): On a group of vector-polynomial permutations |
| 23.3.2023 | Savio Ribas (Universidade Federal de Ouro Preto, Brazil): Zero-sum problems over non-abelian groups |
| 30.3.2023 | online 16:00-16:45 Salvatore Tringali (Hebei Normal University, China): Power monoids and a proof of the Bienvenu-Geroldinger conjecture |
| 20.4.2023 | Aihua Li (Montclair University, USA): New Roles of an Old Puzzle - The Magic Square of Squares Problem |
| 27.4.2023 | Felix Gotti (MIT, USA): On the Ascent of Atomicity |
| 4.5.2023 | Hans-Peter Schröcker (University of Innsbruck): Mechanisms from Algebra – The First Decade of Motion Factorization |
| 11.5.2023 | Daniel Windisch (TU Graz): On local divisor class groups of complete intersections |
| 24.5.2023 | (Wednesday!, 9:30–11:00, SR 11.32) Benjamin Hackl (Uni Graz): Uncovering a Random Tree with Generating Functions |
| 1.6.2023 | Salvatore Tringali (Hebei Normal University, China): On power monoids and their automorphisms |
| 15.6.2023 | Victor Fadinger (University of Graz): Prescribed lengths of factorizations of integer-valued polynomials on Krull domains with prime elements |
| 22.6.2023 | Gülsen Ulucak (Gebze Technical University, Turkey): A new generalization of prime ideals |
Winter Semester 2022/23
| 12.10.2022 | 13:15-14:45 SR 11.34 Salvatore Tringali (Hebei Normal University, China): Premons and factorization under local finiteness conditions |
| 20.10.2022 | Pavel Příhoda (Charles University, Prague): Pure projective torsion free modules |
| 27.10.2022 | Daniel Smertnig (University of Graz): A noncommutative finitely presented atomic domain without ACCP |
| 03.11.2022 | Daniel Windisch (Graz University of Technology): Integer-valued polynomials on DVRs of global fields with prescribed lengths of factorizations |
| 10.11.2022 | no seminar |
| 17.11.2022 | online Martina Juhnke (University of Osnabrück): Alexander Duals of Symmetric Simplicial Complexes and Stanley-Reisner Ideals |
| 24.11.2022 | Florian Russold(Graz University of Technology): Persistent sheaf cohomology |
| 01.12.2022 | online Pierre Bienvenue (Trinity College, Dublin): Power monoid of numerical monoids |
| 15.12.2022 | Andreas Reinhart (University of Graz) : Valuation ideal factorization domains and similar concepts |
| 12.01.2023 | Zahra Nazemian (University of Graz): On Poisson Hopf algebras |
| 19.01.2023 | Cesar Ceballos (Graz University of Technology): Diagonal harmonics and the q,t-Catalan numbers |
Summer Semester 2022
| 3.3.2022 | HS 11.02 John Schmitt (Fulbright-Nawi Graz Visiting Professor): Additive Combinatorics and Polynomial Methods |
| 10.3.2022 | Daniel Windisch (Graz University of Technology): Prime divisors in class groups of affine monoid algebras |
| 17.3.2022 | Victor Fadinger (University of Graz): Weakly Krull monoid algebras and their arithmetic |
| 24.3.2022 | Erhard Aichinger (Johannes Kepler University Linz): Generalizing the Chevalley-Warning Theorem to abelian groups using Frechet's functional equation |
| 31.3.2022 | online Mattia Brescia (Università degli Studi di Napoli Federico II): On cyclic automorphisms of a group |
| 7.4.2022 | Charles Beil (University of Graz): Dimer quivers on surfaces and the Koszul complex |
| 28.4.2022 | online Qinghai Zhong (University of Graz): Monoids of weighted zero-sum sequences |
| 5.5.2022 | John Schmitt (Fulbright-Nawi Graz Visiting Professor): Higher degree Davenport constants over finite commutative rings |
| 12.5.2022 | Michael Wibmer (Graz University of Technology): Matzat's conjecture in differential Galois theory |
| 19.5.2022 | 11:00-12:00 SR 11.34 Ana Garcia Elsner (Universidad Nacional de Mar del Plata, Argentina): Unitary friezes |
| 19.5.2022 | Event in Graz: Celebrating Women in Mathematics see this link for more information |
| 2.6.2022 | 14:15-15:15
Joan Bosa (University of Zaragoza, Spain): The realization problem for von Neumann regular rings 15:30-16:30 Roozbeh Hazrat (Western Sydney University, Australia): Sandpile models and Leavitt algebras |
| 9.6.2022 | online Felix Gotti (MIT, USA): On Atomic Domains not Satisfying the ACCP |
| 23.6.2022 | Sophie Frisch (Graz University of Technology): The stable rank of rings of integer-valued polynomials |
| 30.6.2022 | 16:15-17:45 HS 11.01 Victor Fadinger (University of Graz): PhD-Defense |
Winter Semester 2021/22
| 7.10.2021 | Victor Fadinger (University of Graz): The non-axiomatizability of systems of sets of lengths I |
| 14.10.2021 | Daniel Windisch (Graz University of Technology): The non-axiomatizability of systems of sets of lengths II |
| 21.10.2021 | Azeem M. Khadam (University of Graz): Ideals in a polynomial ring |
| 28.10.2021 | Daniel Vitas (University of Ljubljana): L'vov-Kaplansky conjecture and its variations |
| 11.11.2021 | Zahra Nazemian (University of Graz): BF-property for some class of noetherian domains |
| 18.11.2021 | Qinghai Zhong (University of Graz): On product-one sequences with congruence conditions over dihedral groups |
| 25.11.2021 | Andreas Reinhart (University of Graz): Factorization into OA-ideals |
| 2.12.2021 | 16:00-17:00 Salvatore Tringali (Hebei Normal University, China): Factorization spaces (with a focus on their elasticity) |
| 9.12.2021 | Andreas Reinhart (University of Graz): On transfer Krull monoids |
| 16.12.2021 | 15:15-16:15 Daniel Krenn (University of Salzburg): Decidability of the asymptotics of $k$-regular sequences |
| 13.1.2022 | Dario Spirito (University of Udine): Derived set-like constructions in commutative algebra |
| 20.1.2022 | 17:15-18:15 John Voight (Dartmouth College, USA): Stickelberger's discriminant theorem for algebras |
| 24.1.2022 | 14:00-14:30 Azeem M. Khadam (University of Graz): Secant and Tangential varieties of toric varieties |
Summer Semester 2021
| 28.7.2021 | Aihua Li (Montclair State University): Symbolic Powers of Radical Ideals |
| 4.3.2021 | Pierre-Yves Bienvenu (Max-Planck Institut für Mathematik, Bonn): Linear equations in subsets of the primes I |
| 11.3.2021 | Pierre-Yves Bienvenu (Max-Planck Institut für Mathematik, Bonn): Linear equations in subsets of the primes II |
| 18.3.2021 | Christian Elsholtz (TU Graz): Sums of unit fractions |
| 25.3.2021 | Christian Elsholtz (TU Graz): Improved cap constructions, and sets without arithmetic progressions |
| 15.4.2021 | Victor Fadinger (University of Graz): On product-one sequences |
| 22.4.2021 | Qinghai Zhong (University of Graz): A characterization of length-factorial Krull monoids |
| 29.4.2021 | Wolfgang A. Schmid (University of Paris 8): Monoids of weighted zero-sum sequences over finite abelian groups and applications to factorizations of norms of algebraic integers |
| 6.5.2021 | Charles Beil (University of Graz): Quivers on surfaces: an interplay between algebra, topology, and geometry I |
| 20.5.2021 | Charles Beil (University of Graz): Quivers on surfaces: an interplay between algebra, topology, and geometry II |
| 27.5.2021 | Igor Klep (University of Ljubljana): Factorization of noncommutative polynomials and Nullstellensätze for the free algebra |
| 10.6.2021 | Casper Barendrecht (University of Graz) Shafarevich-Tate groups for certain modular abelian varieties |
| 17.6.2021 | Laura Cossu (University of Graz): An abstract factorization theorem and some applications to idempotent factorizations |
| 24.6.2021 | 16:00-16:45
Günter Lettl
(University of Graz):
Atoms of completely integrally closed submonoids of ℤ2
17:00-17:30 Christian Elsholtz (TU Graz): Fermat’s Last Theorem implies Euclid’s infinitude of primes |
28.7.2021 | Aihua Li (Montclair State University, USA): Symbolic Powers of Radical Ideals |
Winter Semester 2020/21
| 8.10.2020 | Chimere Anabanti (TU Graz): P-free sets in finite groups |
| 15.10.2020 | Qinghai Zhong (University of Graz): A realization theorem for systems of sets of lengths |
| 22.10.2020 | Aqsa Bashir (University of Graz): On a zero-sum problem arising from factorization theory |
| 29.10.2020 | Daniel Smertnig (University of Graz): Monoids of modules over Bass rings and graph agglomerations (background) |
| 5.11.2020 | Daniel Smertnig (University of Graz): Monoids of modules over Bass rings and graph agglomerations |
| 12.11.2020 | Victor Fadinger (University of Graz): A characterization of weakly Krull monoid algebras |
| 19.11.2020 | Amr Al-Maktry (TU Graz): On the group of unit-valued polynomial functions |
| 26.11.2020 | Daniel Windisch (TU Graz): Prüfer domains and the absolute irreducibility of binomial polynomials (background) |
| 03.12.2020 | Daniel Windisch (TU Graz): Prüfer domains and the absolute irreducibility of binomial polynomials |
| 17.12.2020 | 15:15 – 17:00 Andreas Reinhart (University of Graz): Stable domains and their arithmetic |
| 14.1.2021 | 16:00 – 16:45 David J. Grynkiewicz (University of Memphis, USA): The characterization of finite elasticities in Krull domains and Transfer Krull monoids |
| 21.1.2021 | 16:00 – 17:00 Zahra Nazemian (University of Murcia, Spain): Rings and modules with chain conditions up to isomorphism |
| 28.1.2021 | 16:00 – 16:45 Jason Bell (University of Waterloo, Canada): A transcendental dynamical degree |
Summer Semester 2020
| 5.3.2020 | Roswitha Rissner (Alpen-Adria-Universität Klagenfurt): Associated prime ideals of I^n with n ∈ ℕ |
| 12.3.2020 | cancelled |
| 19.3.2020 | cancelled |
| 26.3.2020 | cancelled |
| 30.4.2020 | Laura Cossu (University of Padova): Idempotent factorization of matrices over integral domains (1) |
| 7.5.2020 | Laura Cossu (University of Padova): Idempotent factorization of matrices over integral domains (2) |
| 14.5.2020 | Daniel Windisch (TU Graz): The Multiplicative Arithmetic of Ultraproducts |
| 28.5.2020 | Sophie Frisch (TU Graz): Interpolation, p-adic approximation and other facts indicating that the stable rank of the ring of integer-valued polynomials is 2. |
| 4.6.2020 | M. Azeem Khadam (GC University Lahore): Local Bézout inequalities |
| 18.6.2020 | Sarah Nakato (TU Graz): Absolutely irreducible integer-valued polynomials on a principal ideal domain |
| 25.6.2020 | Nicholas Baeth (Franklin & Marshall College, USA): Factorization in upper triangular matrices over semirings |
| 23.7.2020 | Daniel Windisch (TU Graz), Victor Fadinger (KFU Graz): Definability of subrings |
Winter Semester 2019/20
| 10.10.2019 | Daniel Smertnig: A characterization of noncommutative rational Pólya series (1) |
| 17.10.2019 | Daniel Smertnig: A characterization of noncommutative rational Pólya series (2) |
| 24.10.2019 | 15:15 – 16:15 Jaitra Chattopadhyay (Harish-Chandra Research Institute, Allahabad): Biquadratic fields having a non-principal Euclidean ideal class 16:15 – 17:15 Japhet Odjoumani (Université d'Abomey-Calavi, Benin): On Pell Factoriangular numbers |
| Mi 30.10.2019 | 16:00 – 17:30, HS 11.03, Aqsa Bashir: An introduction to stable domains |
| Mi 6.11.2019 | 16:45 – 18:15, SR 11.34, Japhet Odjoumani (Université d'Abomey-Calavi, Benin): Solving quartic Thue equations by using Tzanakis's method |
| 14.11.2019 | Andreas Reinhart: On factorization into valuation elements (1) |
| 21.11.2019 | Andreas Reinhart: On factorization into valuation elements (2) |
| 28.11.2019 | Jianrong Li: Introduction to representation theory of quantum affine algebras |
| 5.12.2019 | Jianrong Li: Quantum affine algebras and Grassmannians |
| 12.12.2019 | Ana Garcia Elsener: Frieze mutations |
| 9.1.2020 | Charlie Beil: Nonnoetherian algebraic geometry: quivers on hyperbolic surfaces (1) |
| 16.1.2020 | No seminar: Talks concerning open professor position at IMSC (HS 11.02.10:30 - 17:00) |
| 23.1.2020 | Charlie Beil: Nonnoetherian algebraic geometry: quivers on hyperbolic surfaces (2) |
| Mi 29.1.2020 | 15:15 – 16:45, SR 11.34, Qinghai Zhong: On product-one sequences over dihedral groups (1) |
| 30.1.2020 | Qinghai Zhong: On product-one sequences over dihedral groups (2) |
Summer Semester 2019
| 7.3.2019 | Charlie Beil: What is a cluster algebra? (HS 11.02) |
| 14.3.2019 | Dusko Bogdanic: Maximal Cohen-Macaulay approximations |
| 28.3.2019 | Jordan McMahon: Higher tilting theory of type A |
| 4.4.2019 | 15:15 – 16:00 Nick Williams (University of Leicester): Higher analogues of Grassmannian clusters 16:15 – 17:00 Fabian Lenzen (München): Braid group actions on category O |
| 25.4.2019 | Isobel Webster (University of Leeds): A lattice isomorphism theorem for cluster groups of type A |
| 2.5.2019 | cancelled |
| 9.5.2019 | JunSeok Oh: On Erdos-Ginzburg-Ziv inverse theorems for Dihedral and Dicyclic groups |
| 16.5.2019 | David Dolzan (University of Ljubljana): On the commuting graphs of rings and semirings |
| 23.5.2019 | Hanbin Zhang (Chinese Academy of Sciences, Beijing, P.R. China): Symmetries on finite abelian groups and rational Dyck paths |
| 3.6.2019 | Monday 14:00 - 15:00 Markus Schmidmeier (Florida): Ext as a k[T] -module |
| 6.6.2019 | Nicholas R. Baeth (Franklin & Marshall College Lancaster, USA): Arithmetic in finite-complement ideals |
| 13.6.2019 | Felix Gotti (UC Berkeley, USA): A class of primary monoids and the atomicity of their monoid algebras |
| 19.6.2019 | SR 11.33 11:00 – 11:45 Helena Martin Cruz (University of Granada): Algorithmic aspects of factorizations in numerical semigroups |
| SR 11.34 12:00 – 13:00 Aihua Li (Montclair State University, USA): Topics in Algebraic Graph Theory | |
| SR 11.34 13:00 – 13:30 Cheyenne Petzold (Montclair State University, USA): Interlace polynomials of certain graphs | |
| 27.6.2019 | HS 02.23 15:15 – 16:45 JunSeok Oh: Product-one Sequences over Finite Groups: Algebraic, Arithmetic, and Combinatorial Aspects (Defense of Thesis) |
Winter Semester 2018/19
| 4.10.2018 | Irena Swanson (Reed College, USA): A survey of homological algebra |
| 11.10.2018 | Julio J. Moyano-Fernandez (Universitat Jaume I de Castellan, Spain): The occurrence of numerical semigroups in commutative algebra and algebraic geometry |
| 18.10.2018 | Qinghai Zhong: On the arithmetic of C-monoids and domains |
| 25.10.2018 | Cesar Ceballos (Universtität Wien): Hopf dreams and diagonal harmonics |
| 8.11.2018 | Mahadi Ddamulira (TU Graz): On the x-coordinates of Pell equations which are k-generalized Fibonacci numbers |
| 15.11.2018 | Diego Velasco (UNM): Generalized cluster algebras, orbifolds and Caldero-Chapoton functions |
| 22.11.2018 | Andrea Pasquali (University of Uppsala): Self-injective Jacobian algebras |
| 29.11.2018 | Karin Baur: Cluster structure on Grassmannians and root combinatorics |
| 6.12.2018 | Nik Stopar (University of Ljubljana): Rank of elements of general rings |
| Mi 12.12.2018 | 15:00 - 16:00, HS 02.11 Meike Akveld (ETH Zürich): Knoten in der Mathematik - Ein Spiel mit Schnüren, Bildern und Formeln |
| 10.1.2019 | Johannes Brantner: On monoids of ideals of orders in quadratic number fields |
| 17.1.2019 | Ana Garcia Elsener: Introduction to Cluster algebras and results about their factorization |
| 24.1.2019 | Jun Seok Oh: On minimal product-one sequences of maximal length over dihedral and dicyclic groups |
| 31.1.2019 | Salvatore Tringali: On the arithmetic of acyclic and positive monoids |
| 7.2.2019 | Lukas Andritsch: Rigorosum (Defense of PhD), 10:30 – 12:00, HS 11.02 |
Summer Semester 2018
| 8.3.2018 | Michael Kerber (TU Graz): The Representation Theorem of Persistent Homology Revisited and Generalized |
| 15.3.2018 | Shuqin Zhang (MU Leoben): Space-filling curves of fractal sets |
| 12.4.2018 | Amr Al-Maktry (TU Graz): On Null Polynomials of Higher Order |
| 19.4.2018 | Austin Antoniou (Ohio State University, USA): Power Monoids: Connecting factorization theory to additive combinatorics |
| 26.4.2018 | Qinghai Zhong: Sets of arithmetical invariants in transfer Krull monoids |
| 3.5.2018 | Ana Garcia-Elsener: AR-quivers of CM modules from Grassmannians |
| 24.5.2018 | Salvatore Tringali: Structural properties of subadditive sequences with applications to factorization theory and additive combinatorics |
| 7.6.2018 | Alireza Nasr-Isfahani (University of Isfahan, Iran): Maximal forward hom-orthogonal sequences for cluster-tilted algebras of finite type |
| Fr 8.6.2018 | Maitreyee Kulkarni (Louisiana State Univ.): (14:00 – 15:30) Dimer models on cylinders over Dynkin diagrams and cluster algebras |
| 21.6.2018 | Lukas Andritsch: A note on friezes of type Lambda_p |
| 28.6.2018 | Sofja Afanaseva (St. Petersburg State University, Russia): Local Class Field Theory and the Formal Groups |
| Di 3.7.2018 | Ilke Canakci (Newcastle University): Perfect matchings and modules over dimer algebras |
| Mi 25.7.2018 | Salomon Dominguez (Universidad Anahuac, Mexico-City): Arc representations |
| 26.7.2018 | Eleonore Faber (University of Leeds): From the Magic Square of reflections and rotations to the McKay correspondence |
Winter Semester 2017/18
| 12.10.2017 | Christian Elsholtz (TU Graz): Maximal sets in F_q^n avoiding progressions |
| 19./20.10.2017 | 60. Geburtstag Prof. Robert Tichy: Festkolloquium an der TU Graz |
| 9.11.2017 | Christoph Aistleitner (TU Graz): Pair correlations, additive combinatorics, and some linear algebra |
| 16.11.2017 | Qinghai Zhong: Long sets of lengths with maximal elasticity |
| 23.11.2017 | Sarah Nakato (TU Graz): Integer-valued polynomials on rings of integers in number fields with prescribed sets of lengths |
| 30.11.2017 | Charles Beil: The geometry of nonnoetherian coordinate rings |
| 7.12.2017 | Salvatore Tringali: On the structure of unions of sets of lengths |
| 14.12.2017 | DK Day 2017 an der TU Graz: Programm |
| 11.1.2018 | Sophie Frisch (TU Graz): On the spectrum of rings of functions |
| 18.1.2018 | Roswitha Rissner (TU Graz): f-vectors of simplicial and simple polytopes |
| 25.1.2018 | JunSeok Oh: Product-one sequences over finite groups |
Summer Semester 2017
| 09.03.2017 | Matt Pressland (MPI, Bonn): Perfect matchings and the Grassmannian cluster algebra |
| 23.03.2017 | Karin Baur: Transfinite mutations |
| 30.03.2017 | Robert Marsh (Leeds University): Braid groups and quiver mutation |
| 06.04.2017 | Daniel Smertnig: Arithmetical invariants of local quaternion orders |
| 04.05.2017 | Dusko Bogdanic: Extensions between Cohen-Macaulay modules of Grassmannian cluster categories |
| 18.05.2017 | Salvatore Tringali: Periodic properties of directed families with applications to factorization theory |
| 01.06.2017 | Michael Gekhtman (Notre Dame University): Dilogarithm identities in cluster algebras from Hamiltonian/Lagrangian point of view |
| 08.06.2017 | Ana Garcia Elsener: Gentle 2-Calabi-Yau tilted algebras |
| 16.06.2017 | 13:00 - 13:45, Raquel Coelho Simoes (Univ. Lissabon): Reduction for negative Calabi-Yau triangulated categories 14:00 - 14:45, David Pauksztello (Univ. Verona): Extensions and mapping cones for gentle algebras |
| 22.06.2017 | Hanbin Zhang: An introduction to classical invariant theory and its application to zero-sum theory |
| 29.06.2017 | 15:15 - 16:15, Zhi-Wei Sun (Nanjing University, China): Restricted sums of three or four squares 16:45 - 17:45, David J. Grynkiewicz (University of Memphis, USA): On the Degree of Regularity of (x_1-y_1) + ... + (x_1-y_k) = c |
| 19.07.2017 | Alex Martsinkovsky (Northeastern University): (Co)torsion via stabilization of additive functors |
Winter Semester 2016/17
| 14.10.2015 | ALGEBRA and NUMBER THEORY DAY HS 11.02 10:30 - 11:15 Weidong Gao (Nankai University, China): Zero-sum subsequences of distinct lengths 11:30 - 12:15 Wolfgang A. Schmid (University Paris 8 & 13, France): Transfer Krull monoids and weakly Krull monoids: a comparison of their sets of lengths 14:00 - 14:45 Pedro A. García-Sánchez (University Granada, Spain): Numerical semigroups 15:00 - 15:45 Salvatore Tringali (Universität Graz): Unions of sets of lengths |
| 20.10.2016 | Yushuang Fan: Minimal relations and catenary degrees in Krull monoids |
| 27.10.2016 | Qinghai Zhong: Sets of minimal distances and characterizations of class groups of Krull monoids |
| 3.11.2016 | Cesar Ceballos (Universität Wien): Subword Complexes in Algebra, Combinatorics, and Geometry |
| 10.11.2016 | Intan Muchtadi-Alamsyah (ITB, Indonesia): Research on Skew Polynomial Rings |
| 17.11.2016 | Lukas Andritsch: Boundary algebra of a GL_m-dimer |
| 1.12.2016 | Jordan McMahon: Higher Frieze Patterns |
| 15.12.2016 | Andreas Reinhart: On the monotone catenary degree |
| 12.1.2017 | Salvatore Tringali: A Bridge between Factorization Theory and Arithmetic Combinatorics |
| 19.1.2017 | Junseok Oh: On the algebraic and arithmetic structure of the monoid of product-one sequences over a finite group |
| 26.1.2017 | Konrad Schrempf (TU Graz): Linearizing the Word Problem in (some) Free Fields |
Summer Semester 2016
| 10.3.2016 | Daniel Smertnig: A survey on factorizations of elements in noncommutative rings |
| 17.3.2016 | Wolfgang Rump (Universität Stuttgart): Non-commutative Arithmetic |
| 14.4.2016 | Colloquium on the occasion of the 60th birthday of Günter Lettl, HS 11.02 15:00 Robert Tichy (TU Graz): Laudatio 15:15 Nigel Byott (University of Exeter): Scaffolds and Local Galois Module Structure 16:00 Coffee break 16:30 Ernst-Ulrich Gekeler (Universität des Saarlandes): Stochastic Structures in Number Theory 17:20 Attila Pethõ (University of Debrecen): Parametrized Families of Thue Equations á la Günter Lettl |
| 21.4.2016 | Qinghai Zhong: The set of distances in seminormal weakly Krull monoids |
| 28.4.2016 | Yushuang Fan: Products of k atoms in Krull monoids |
| 12.5.2016 | Carmelo Finocchiaro (TU Graz): General Topology, intersections of modules and flatness |
| 19.5.2016 | Špela Špenko (University of Edinburgh): Non-commutative resolutions of quotient singularities for reductive groups |
| 2.6.2016 | Roswitha Rissner (TU Graz): Matrices over commutative rings |
| 16.6.2016 | Sibylle Schroll (University of Leicester): Multiserial algebras |
| 23.6.2016 | István Gaál (Univ. Debrecen): Monogenity of number fields |
| 30.6.2016 | Change of room: SR 11.32 |
| 15:00 – 15:45: Janko Marovt (University of Maribor): Partial orders in Rickart rings | |
| 15:45 – 16:30: Paul Martin (University of Leeds): Diagram categories old and new | |
| 11.7.2016 | Change of room: SR 11.34 |
| 14:00 – 14:45: Alireza Nasr (IPM, Isfahan): On Lie algebras associated with representation-finite algebras | |
| 15:00 – 15:45: Salvatore Stella (Università degli studi di Roma "La Sapienza"): Kac-Moody groups, generalized minors, and quiver representations |
Winter Semester 2015/16
| 8.10.2015 | Andreas Reinhart: Divisor-class groups of monadic submonoids of certain rings of integer-valued polynomials (1) |
| 15.10.2015 | Andreas Reinhart: Divisor-class groups of monadic submonoids of certain rings of integer-valued polynomials (2) |
| 22.10.2015 | Anne-Sophie Gleitz (Université de Caen, France): Generalised cluster algebras and quantum affine algebras at roots of unity |
| 29.10.2015 | Qinghai Zhong: A characterization of class groups via sets of lengths (1) |
| 12.11.2015 | Alfred Geroldinger: A characterization of class groups via sets of lengths (2) |
| 19.11.2015 | Mark Parsons: Infinite friezes |
| 26.11.2015 | Anne Moreau (Université de Poitiers, France): Joseph ideals and minimal lisse W-algebras |
| 3.12.2015 | 16:00 Uhr, TU-Graz, Steyrergasse 30/II, SR A206 Jean-Luc Chabert (Université de Picardie-Jules Verne, Amiens, France): Polynomial overrings of Int(Z) |
| 10.12.2015 | 15:15 – 16:00: Manuela Tschabold: Growth behaviour of frieze patterns 16:30 – 17:15: Raquel Coelho Simoes (Univ. Lissabon): "Negative" cluster-tilted algebras and tiling algebras |
| 4.1. - 8.1.2016 | Conference Combinatorial and Additive Number Theory 2016 |
| 14.1.2016 | Christopher Frei (TU Graz): t.b.a. |
| 21.1.2016 | Manuela Tschabold: Infinite friezes of positive integers (PhD defense) |
| 28.1.2016 | Rosie Laking (University of Manchester, U.K.): The Ziegler spectrum of a derived-discrete algebra |
Summer Semester 2015
| Di 10.3.2015 | SR 11.13, Heinrichstraße 36, 1. Stock 16:15 – 17:00 István Gaál (Univ. Debrecen): Power integral bases in algebraic number fields 17:15 – 18:00 Aihua Li (Montclaire State Univ.): Prime Spectra of Certain Two Dimensional Integral Domains -- History and New Development |
| 19.3.2015 | Dusko Bogdanic: Existence of gradings on associative algebras |
| 30.4.2015 | Daniel Smertnig: Every abelian group is the class group of a (noncommutative) simple Dedekind domain |
| 7.5.2015 | Sophie Frisch (TU Graz): Polynomial functions on non-commutative rings |
| 21.5.2015 | Raquel Coelho Simoes (Univ. Lissabon): Mutations of Hom-configurations in negative Calabi-Yau triangulated categories |
| 18.6.2015 | Günter Lettl: Orders in cubic number fields |
| 25.6.2015 | 15:15 - 16:15 Ligia Loretta Cristea: On labyrinth fractals 16:45 - 17:45 David J. Grynkiewicz (Univ. Memphis, USA): The \rho_k Invariants for Finite Abelian Groups |
Winter Semester 2014/15
| 9.10.2014 | Paul Baginski (Fairfield University, USA): Length Multiplicity Set Complete Krull Monoids |
| 16.10.2014 | Thomas Wunderer: Class semigroups |
| 23.10.2014 | Andreas Reinhart: On conductor ideals |
| 6.11.2014 | 15:00 – 16:00 Uhr Christian Elsholtz (TU Graz): Some recent results on additive decomposition of sets |
| Di 11.11.2014 |
14:00 – 15:30 Uhr, SR 15.33, Resowi Bauteil B Nils Carqueville (Universität Wien): Equivariant completion and Dynkin quivers |
| 20.11.2014 | Lutz Hille (Münster): Tilting Modules and Root Polytopes |
| 4.12.2014 | Mark Parsons: Explicit construction of companion bases |
| 11.12.2014 | Hannah Vogel: Asymptotic triangulations & Coxeter transformations of C_{p,q} |
| 15.1.2015 | Sebastian Ramacher: Bilinear pairings on elliptic curves |
| 22.1.2015 | Manuela Tschabold: Periodic infinite friezes from punctured discs (2) |
| 29.1.2015 | Daniel Smertnig: A transfer homomorphism for (some) bounded Dedekind prime rings |
Summer Semester 2014
| 13.3.2014 | Franz Halter-Koch: Principal ideals in quadratic orders and Diophantine equations |
| 3.4.2014 | Sira Gratz (Leibniz Univ. Hannover): Cluster algebras of infinite rank as colimits |
| 10.4.2014 | Dietrich Burde (Univ. Wien): Faithful Lie algebra representations of minimal degree |
| 8.5.2014 | Dusko Bogdanic: Stable equivalences and gradings |
| 15.5.2014 | Andreas Reinhart: About special classes of SP-domains |
| 22.5.2014 | Daniel Smertnig: Rigorosum (Defense of PhD), 15:15 – 17:00, HS 10.01 |
| Fr 23.5.2014 | Alberto Facchini (Univ. Padua): Some particular direct-sum decompositions and direct-product decompositions, 10:30 – 11:30, HS 11.01 |
| 5.6.2014 | Daniel Smertnig: The Davenport constant of subsets of finitely generated free abelian groups |
| 12.6.2014 | Daniel Smertnig: A semigroup-theoretical view of direct-sum decompositions and associated combinatorial problems |
| Mo 16.6.2014 | Chanwit Prabpayak: Rigorosum (Defense of PhD), 14:00 – 15:30 Uhr, SR 11.32 |
| Di 17.6.2014 | István Gaál (Univ. Debrecen): Calculating small solutions of relative Thue equations, 14:00 – 14:45 Uhr, SR 11.34 Timea Szabó (Univ. Debrecen): Power integral bases in infinite families of quartic fields, 15:00 – 15:15 Uhr, SR 11.34 |
| 26.6.2014 | Manuela Tschabold: Periodic infinite friezes from punctured discs |
| 3.7.2014 |
John R. Schmitt (Middlebury, USA): Warning's second theorem with restricted variables, 15.15.16:00 Uhr David J. Grynkiewicz (Univ. Memphis, USA): The index of zero-sum free sequences and Kummer subspaces, 16:30 – 17:15 Uhr [16:00 – 16:30 Coffee break] |
Winter Semester 2013/14
| 10.10.2013 | Sebastian Ramacher: On Krull and Mori rings with zero-divisors |
| 17.10.2013 | Andreas Reinhart: Rings of integer-valued polynomials and monadic properties |
| 24.10.2013 | Roswitha Rissner (TU Graz): Skolem closure of ideals |
| 31.10.2013 | Hannah Vogel: On the shape of subword complexity sequences of finite words |
| 7.11.2013 | Dusko Bogdanic: Representation Theory of Symmetric Groups (1) |
| 14.11.2013 | Dusko Bogdanic: Representation Theory of Symmetric Groups (2) |
| 28.11.2013 | Mario Weitzer (Montanuniversität Leoben): The distribution of real polynomials with bounded roots |
| 19.12.2013 | Alain Plagne (École Polytechnique, Paris): Christian Elsholtz (TU Graz): (16:15 – 17:00) |
| 9.1.2014 | Chanwit Prabpayak: Orders in purely cubic number fields |
| 16.1.2014 | Amnon Rosenmann (Austrian Institute of Technology): On the edge expansion of infinite Cayley graphs |
| 23.1.2014 | Jernej Pribosek: Parabolic orbits and $\Delta$-filtered modules |
| 30.1.2014 | Raquel Coelho Simoes (Univ. Lissabon): Hom-configurations in triangulated categories generated by spherical objects Jeanne Scott (Boston, USA): Combinatorics of the Grassmannian's BZ-twist (16:15 - 17:15) |
Summer Semester 2013
| 7.3.2013 |
Robert Marsh (University of Leeds): From triangulated categories to module categories via localization Lisa Lamberti (ETH Zürich): Chebyshev polynomials and tensor diagrams (17:15 – 18:15) |
| 14.3.2013 | Nicholas Baetz (Univ. Central Missouri): Factorization Theory applied to Direct-sum Decompositions of Modules |
| 4.4.2013 | Iulian Simion (EPFL Lausanne): Double centralizers of unipotent elements in simple algebraic groups |
| 25.4.2013 |
David Grynkiewicz: The Davenport Constant for Non-Abelian Groups Ademir Hujdurivic (University of Primorska): Pentavalent symmetric bicirculants (17:15 – 18:00) |
| 2.5.2013 |
Wolfgang A. Schmid (Université Paris 8): Bounds and some exact values for plus-minus weighted Davenport constants and some related problems |
| 23.5.2013 | Daniel Smertnig: A study of factorizations in non-commutative semigroups |
| 6.6.2013 | Giulio Peruginelli (TU Graz): Integer-valued polynomials over sets of algebraic integers of bounded degree |
| 13.6.2013 | Mark Parsons: Cluster algebras of finite type and companion bases (1) |
| 20.6.2013 | Mark Parsons: Cluster algebras of finite type and companion bases (2) |
| 27.6.2013 | Karin Baur: Postnikov diagrams and categories associated to Grassmannians |
| 12.7.2013 | Thomas Brüstle (Université de Sherbrooke, Québec): The decorated mapping class group of a marked surface |
Winter Semester 2012/13
| 11.10.2012 | Alfred Geroldinger: Local and global tameness in Krull monoids |
| 18.10.2012 | Chanwit Prabpayak: Characterization of conductors in algebraic number fields |
| 25.10.2012 | Alain Plagne (École Polytechnique, Paris): Sets with forbidden linear constraints |
| 8.11.2012 | 15:15 – 16:15: Benjamin Girard (Université Paris 6): On the intersection of a hyperplane of (F_p)^l with the l-cube |
| 8.11.2012 | 16:45 – 17:45: Christian Elsholtz (TU Graz): Subsetsums / Hilbert cubes in multiplicatively defined sets |
| 22.11.2012 | Manuela Tschabold: What is a Frieze Pattern? |
| 29.11.2012 | Jernej Pribosek: Parabolic orbits via $\Delta$-filtered modules |
| 13.12.2012 | Mara D. Neusel (Texas Tech Univ., USA): Orbit Chern Classes |
| 10.1.2013 | Salvatore Stella (North Eastern Univ. Boston, USA): Polyhedral models for generalized associahedra via Coxeter elements |
| 17.1.2013 | Andreas Reinhart: Seminormal orders and the half-factorial property (1) |
| 24.1.2013 | Andreas Reinhart: Seminormal orders and the half-factorial property (2) |
| 31.1.2013 | Franz Halter-Koch: Lucas sequences and quadratic orders (15:15 – 16:45) Raquel Simoes (Leibniz Universität Hannover): Maximal rigid objects as noncrossing bipartite graphs (17:15 – 18:15) |
| Mi 13.2.2013 | David Pauksztello (Universität Hannover): An introduction to co-t-structures and co-stability conditions (14:15 – 15:15) Sira Gratz (Universität Hannover): Mutation of torsion pairs in triangulated categories (15:45 – 16:45) |