INSTITUTE FOR MATHEMATICS AND SCIENTIFIC COMPUTING

  Text Karl-Franzens-Universitaet logo uni graz
 Homepage Institute  University of Graz
header grafik
 Home
 
 

AlgNTh


Research group for Algebra and Number Theory


 

All talks are Thursday at 15.15-16.45, Room SR 11.32


Program of Lectures in WS 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):
25. 1. 2018 JunSeok Oh:


Program of Lectures in SS 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 Simões (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


Program of Lectures in WS 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


Program of Lectures in SS 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


Program of Lectures in WS 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 Simões (Univ. Lissabon): "Negative" cluster-tilted algebras and tiling algebras
 
4.1. - 8.1. 2016
 
 
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


Program of Lectures in SS 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 Simões (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


Program of Lectures in WS 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


Program of Lectures in SS 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, 14-14:45 Uhr, SR 11.34
Timea Szabó (Univ. Debrecen): Power integral bases in infinite families of quartic fields, 15-15:15 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]


Program of Lectures in WS 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 Simões (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)


Program of Lectures in SS 2013

7. 3. 2013
 
Robert Marsh (University 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


Program of Lectures in WS 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)

 

 Home
 
footer bild
last changed on April, 26nd 2016