Seminar Gruppen und Darstellungen- TU Kaiserslautern

Seminar Gruppen und Darstellungen

Wintersemester 2018/19

Organisatoren: Dr. Niamh Farrell und Dr. Alessandro Paolini

Termin: Donnerstags 17:15-18:15, Raum 48-436

Donnerstag, 25. Oktober 2018: Melissa Lee [Imperial College London],
- Titel: Bases of almost quasisimple groups and Pyber's conjecture [Abstract]

Donnerstag, 1. November 2018: Kein Seminar (Allerheiligen)

Donnerstag, 8. November 2018: Yann Palu [LAMFA, Amiens]
- Titel: From cluster algebras to cluster categories [Abstract]
  
  The classification of cluster algebras with finitely many clusters shares some similarities with Gabriel's theorem on the classification of finite dimensional algebras (or quivers) of finite representation type. The link between cluster algebras and representation theory of quivers, first studied by Marsh-Reineke-Zelevinsky, was made more precise by Buan-Marsh-Reineke-Reiten-Todorov (see also Caldero-Chapoton-Schiffler for type A) by using the so-called cluster categories. This talk will be an introduction to the representation theory of quivers and to cluster categories. We will mainly focus on the example of quivers of Dynkin type A.

Donnerstag, 15. November 2018: Stacey Law [University of Cambridge]
- Titel: Linear characters of Sylow subgroups of the symmetric group [Abstract]
  
  Let p be an odd prime and n a natural number. We determine the irreducible constituents of the permutation module induced by the action of the symmetric group S_n on the cosets of a Sylow p-subgroup P_n . In the course of this work, we also prove a symmetric group analogue of a well-known result of Navarro for p-solvable groups on a conjugacy action of N_G(P ). Before describing some consequences of these results, we will give an overview of the background and recent related results in the area.

Mittwoch(!), 21. November 2018, 17:15-18:15: Theodosios Douvropoulos [Institut de Recherche en Informatique Fontamentale]
- Titel: Coxeter numbers: From fake degree palindromicity to the enumeration of reflection factorizations of regular elements [Abstract]
  
  A famous theorem of Cayley states that there are n^{n-2} vertex-labeled trees on n vertices. A different interpretation of this number, due to Hurwitz, is that it counts smallest length factorizations of the Coxeter element (12...n) of S_n in transpositions. As with many fascinating theorems for the Symmetric group, this statement is the shadow of a result that holds for all reflection groups. Bessis has shown after case-by-case calculations that: The number of smallest length reflection factorizations of a Coxeter element c of W is equal to h^n*n!/|W|, where h is the order of the Coxeter element and n the rank of W. We will present in this talk a uniform argument for this statement (that however relies on the BMR-freeness theorem) and partial generalizations of it that hold for arbitrary regular elements and arbitrary length factorizations. A classical approach due to Frobenius translates the above problem into a series of character evaluations. In the absence of a uniform construction of the characters $\chi$ of complex reflection groups, our method first groups the characters together with respect to an invariant called the Coxeter number $c_{\chi}$. It proceeds by making use of a Galois action on the corresponding Hecke algebra characters which was first considered by Malle to prove a palindromicity phenomenon on the fake degrees of W.

Donnerstag, 29. November 2018: Lleonard Rubio y Degrassi [University of Leicester]
- Titel: On the Lie structure of $HH^1$ of tame blocks [Abstract]
  
  Blocks are usually classified by Morita or derived equivalence or by stable equivalence of Morita type. Stable equivalences of Morita type are the most general and frequent in modular representation theory but also the least understood. The main reason is that we do not know if many of the invariants for Morita and derived equivalences are still invariants for stable equivalences of Morita type.
  In this context, Hochschild cohomology records crucial information about a block $B$: its first degree component, denoted by $HH^1(B)$ is a Lie algebra and it is invariant under stable equivalences of Morita type. However, there are very few families of blocks for which the Lie algebra structure of $HH^1$ has been calculated. Therefore it is essential to extend these calculations to further families of examples.
  In this talk I will show that if $B$ is a block with tame representation type, then $HH^1(B)$ is a solvable Lie algebra. This is joint work with Sibylle Schroll and Andrea Solotar.

Donnerstag, 6. Dezember 2018: Kein Seminar (Nikolaus Conference)

Donnerstag, 13. Dezember 2018: Ruwen Hollenbach [TU Kaiserslautern]
- Titel: Quasi-Isolated Blocks of Finite Groups of Lie Type [Abstract]
  
  In a recent paper G. Malle and G. Robinson proposed a modular analogue to the k(B)-conjecture. If B is a p-block with defect group D, then they conjecture that l(B) \leq p^r, where r is the sectional p-rank of D. I will talk about recent progress on this conjecture for finite groups of Lie type.

Dienstag(!), 18. Dezember 2018, 17:15-18:15 (Raum: 48-208): Jesua Chavez [Institut de Mathématiques de Jussieu-Paris Rive Gauche]
- Titel: Howe correspondence between Harish-Chandra series [Abstract]

Donnerstag, 3. Januar 2019: kein Seminar

Donnerstag, 10. Januar 2019: Lucas Ruhstorfer [Wuppertal]
- Titel: Fake Galois Actions [Abstract]

Donnerstag, 17. Januar 2019: David Stewart [Newcastle]
- Titel: Gröbner bases, smooth centralisers and the Lefschetz principle [Abstract]
  
  (Joint with Ben Martin and Lewis Topley). In a paper in the now defunct LMS Journal of Computation I used GAP to compute the Lie-theoretic centralisers in the exceptional groups of elements in their minimal modules in all characteristics, establishing when the centralisers in the groups were smooth. Non-smoothness was only found in very small characteristics, even where there are infinitely many orbits. This led to a question on when all centralisers of elements in a Z-defined representation would be smooth if the characteristic were large enough. With my co-authors we managed to prove this using the Lefschetz principle from model theory applied to Gröbner bases, which gave rise to what we call ‘d-bounded Hopf quadruples’. I’ll explain some of this.

Donnerstag, 24. Januar 2019: Tung Le [University of Pretoria]
- Titel: On Characters of a Sylow p-subgroup of a Chevalley group G(p^f) [Abstract]

Donnerstag, 31. Januar 2019: Simon Goodwin [University of Birmingham]
- Titel: Representations of reduced enveloping algebras for gl_n and restricted Yangians [Abstract]

Donnerstag, 7. Februar 2019: kein Seminar

Donnerstag, 14. Februar 2019, 17:00 Uhr(!): Arezoo Aslizadeh [TU Kaiserslautern/ Shahid Beheshti University, Tehran]
- Titel: The nilpotent multipliers of the direct sum of Lie algebras [Abstract]

Frühere Semester

Organisatoren: Dr. Niamh Farrell and Dr. Alessandro Paolini

Donnerstag, 12. April 2018: Kein Seminar.

Donnerstag, 19. April 2018: Kein Seminar.

Donnerstag, 26. April 2018: Kein Seminar.

Donnerstag, 3. Mai 2018: Keivan Mallahi-Karai [Jacobs University, Bremen]
- Titel: Kirillov's orbit method and the polynomiality of the essential dimension of p-groups

Montag, 7. Mai 2018: Thomas Gobet [University of Sydney]
- Titel: Dual and classical generators of Artin groups of spherical type

Donnerstag, 17. Mai 2018: Zhicheng Feng [TU Kaiserslautern]
- Titel: On the inductive blockwise Alperin weight condition for special linear and unitary groups

Donnerstag, 24. Mai 2018: Keine Seminar

Donnerstag, 31. Mai 2018: Kein Seminar (Fronleichnam)

Donnerstag, 7. Juni 2018: two seminars.
- 16.30-17.30: İpek Tuvay [Mimar Sinan Fine Arts University, Istanbul]
  - Titel: Brauer indecomposability of Scott modules for the quadratic group Qd(p)
- 17.30-18.30: Kivanc Ersoy [Freie Universität Berlin]
  - Titel: Groups with certain conditions on fixed points of automorphisms

Donnerstag, 14. Juni 2018: Iulian Simion [Babes-Bolyai University, Cluj]
- Titel: Minimal realizations of finite groups of isometries

Donnerstag, 21. Juni 2018: Alex Malcolm [Heilbronn Institute for Mathematics, Bristol]
- Titel: Strong reality in finite simple groups: on products of classes and characters

Donnerstag, 28. Juni 2018: Kein Seminar

Donnerstag, 05. Juli 2018: Kein Seminar

Donnerstag, 12. Juli 2018: Madeleine Whybrow [TU Kaiserslautern]
- Titel: Constructing Majorana representations

Organisatoren: Jun.-Prof. Dr. Caroline Lassueur and Dr. Alessandro Paolini

Donnerstag, 26. Oktober 2017: Andrew Mathas [University of Sydney]
- Titel: Jantzen filtrations and graded Specht modules
  
  The Jantzen sum formula is a classical result in the representation theory of the symmetric and general linear groups that describes a natural filtration of the Specht modules over any field. Analogues of this result exist for many algebras including the cyclotomic Hecke algebras of type A. Quite remarkably, the cyclotomic Hecke algebras of type A are now know to admit a Z-grading because they are isomorphic to cyclotomic KLR algebras. I will explain how to give an easy proof, and stronger formulation, of Jantzen sum formula for the cyclotomic Hecke algebras of type A using the KLR grading. I will discuss some consequences and applications of this approach.

Donnerstag, 02. November 2017: Caroline Lassueur [TU Kaiserslautern]
- Titel: Lifting Morita equivalences with an endo-permutation source

Donnerstag, 09. November 2017: Kein Seminar

Donnerstag, 16. November 2017: Olivier Dudas [Université Paris Diderot - Paris 7]
- Titel: On the unitriangular shape of decomposition matrices for finite reductive groups

Donnerstag, 23. November 2017: Reda Chaneb [Université Paris Diderot - Paris 7]
- Titel: Basic sets for unipotent blocks of finite reductive groups

Donnerstag, 7. December 2017, Oberseminar Representation Theory : Emil Rotilio [TU Kaiserslautern]
- Titel: Lie superalgebras in Physics
  The current understanding of nature finds in the „Standard Model“ the most complete and verified theory (for now). The mathematics it involves heavily relies on Lie theory (Lie groups and Lie algebras). To better describe the universe, phisicists have come up with a „Supersymmetry“ theory (among others). This theory is described in terms of Lie superalgebras. The goal of this talk is to give an overview of which Lie algebras/superalgebras are used in Physics and why they help describing nature.

Donnerstag, 14. December 2017: Stefano Sannella [University of Birmingham]
- Titel: Broué's conjecture and perverse equivalences
  The representation theory of a finite group G over a field F of positive characteristic carries many questions that have not been answered yet. Most of them can be stated as global/local conjectures: in various forms, they state that the representation theory of G is somehow controlled by its p-local subgroups. Here we will mostly focus on one of these conjectures, Broué's Abelian Defect Group Conjecture, which might be considered as an attempt to give a structural explanation of what is actually connecting G and its local p-subgroups in the abelian defect case. In particular, we explain how the strategy of looking for a perverse equivalence (a specific type of derived equivalence) works successfully in some cases and how this procedure is related to some Deligne-Lusztig varieties.

Donnerstag, 21. December 2017: Patrick Wegener [TU Kaiserslautern]
- Titel: Hurwitz action in elliptic Weyl groups and coherent sheaves on a weighted projective line
  Since 2000 the poset of noncrossing partitions attached to a Coxeter
  group (independently introduced by Bessis and Brady-Watt) has gained a
  lot of attention from different areas of mathematics. In 2010 Igusa,
  Schiffler and Thomas showed that there exists an order preserving
  bijection between this poset and the set of thick subcategories in the
  derived category of mod(A) generated by an exceptional sequence, where
  A is a hereditary Artin algebra. Following Happel's classification of
  hereditary categories, it seems natural to ask if there is an analogous
  statement when replacing mod(A) by the category of coherent sheaves on a
  weighted projective line. I will give a short summary on hereditary
  categories, explain how elliptic Weyl groups show up in this context and
  then generalize the result of Igusa-Schiffler-Thomas to tubular weighted
  projective lines. (This is joint work with B. Baumeister and S. Yahiatene.)

Donnerstag, 11. Januar 2018: Kein Seminar.

Donnerstag, 18. Januar 2018: Florian Eisele [City, University of London]
- Titel: A counterexample to the first Zassenhaus conjecture
  There are many interesting problems surrounding the unit group U(RG) of the ring RG,
  where R is a commutative ring and G is a finite group. Of particular interest are the finite subgroups of
  U(RG). In the seventies, Zassenhaus conjectured that any u in U(ZG) is conjugate, in the group U(QG),
  to an element of the form +/-g, where g is an element of the group G. This came to be known as the "Zassenhaus conjecture".
  
  In recent joint work with L. Margolis, we were able to construct a
  counterexample to this conjecture. In this talk I will give an introduction to the various conjectures surrounding finite subgroups of U(RG),
  and how they can be reinterpreted as questions on the (non-)existence of certain R(GxH)-modules, where H is another finite group.
  This establishes a link with the representation theory of finite groups, and I will explain how, p-locally, our example is made up of certain p-permutation modules.

Donnerstag, 25. Januar 2018: Petra Schwer [Karlsruher Institut für Technologie]
- Titel: Reflection length in affine Coxeter groups
  
  Affine Coxeter groups have a natural presentation as reflection groups on some
  affine space. Hence the set R of all its reflections, that is all conjugates of its
  standard generators, is a natural (infinite) set of generators. Computing the reflection
  length of an element in an affine Coxeter group means that one wants to determine
  the length of a minimal presentation of this element with respect to R.
  In joint work with Joel Brewster Lewis, Jon McCammond and T. Kyle Petersen we were
  able to provide a simple formula that computes the reflection length of any element
  in any affine Coxeter group. In this talk I would like to explain this formula, give
  its simple uniform proof and allude to the geometric intuition behind it.

Donnerstag, 1. Februar 2018: Kein Seminar

Donnerstag, 8. Februar 2018: Kein Seminar

Organisator: Dr. Alessandro Paolini

Donnerstag, 20. April 2017: Kein Seminar

Donnerstag, 27. April 2017: Kivanç Ersoy [TU Kaiserslautern]
- Titel: Locally finite groups with small centralizers

Donnerstag, 4. Mai 2017: Emily Norton [Max Planck Institute Bonn]
- Titel: The \mathfrak{sl}_\infty-crystal combinatorics of higher level Fock spaces

Donnerstag, 11. Mai 2017: Andreas Bächle [Vrije Universiteit Brussel]
- Titel: Rationality of groups and centers of integral group rings

Donnerstag, 18. Mai 2017: Kein Seminar

Donnerstag, 25. Mai 2017: Kein Seminar

Donnerstag, 1. Juni 2017: Kein Seminar

Donnerstag, 08. Juni 2017: William Wong [TU Kaiserslautern]
- Titel: A phenomenon in the representation of SL(2,q) in defining characteristics

Donnerstag, 13. Juni 2017: Wolfgang Willems [Otto-von-Guericke-Universität Magdeburg]
- Titel: On quasi-projective Brauer characters

Donnerstag, 22. Juni 2017: Baptiste Rognerud [IRMA, Straßburg]
- Titel: A Morita theory for permutation modules

Donnerstag, 29. Juni 2017: Julian Külshammer [Universität Stuttgart]
- Titel: Ringel duality as a special case of Koszul duality

Donnerstag, 05. Juli 2017: Tung Le [University of Pretoria]
- Titel: On the automorphisms of designs constructed from finite simple groups

Donnerstag, 13. Juli 2017: Kein Seminar ("Representation Theory in Kaiserslautern" Konferenz)

Donnerstag, 20. Juli 2017: Yujiao Sun [Universität Stuttgart]
- Titel: Supercharacter theories for Sylow p-subgroups of finite exceptional groups of Lie type

*Freitag, 25. August 2017, 14:00-15:00*: Shigeo Koshitani [University of Chiba]
- Titel: Brauer indecomposability of Alperin-Scott modules for finite non-abelian 2-groups

Organisator: Dr. Julian Brough und Jun.-Prof. Dr. Caroline Lassueur

Donnerstag, 3. November 2016, : Yanjun Liu [TU Kaiserslautern]
- Titel: Principal and defect-zero blocks of finite groups

Donnerstag, 24. November 2016, : Niamh Farrell [TU Kaiserslautern/City, University of London]
- Titel: The rationality of blocks of quasi-simple finite groups

Donnerstag, 25. November 2016: Jesper Grodal [Københavns Universitet]
- Titel: Endotrivial modules via homotopy theory

Donnerstag, 1. Dezember 2016: Emilio Pierro [Universität Bielefeld]
- Titel: Quantities associated to the subgroup lattice

Donnerstag, 8. Dezember 2016: Kein Seminar: 9.-10. Dez. Nikolauskonferenz

Donnerstag, 15. Dezember 2016: Kein Seminar: Konferenz "Finite simple groups, their fusion systems and representations", EPFL

Donnerstag, 12. Januar 2017: Kein Seminar: 12.-14. Jan. Permutation Konferenz, Bielefeld University

Donnerstag, 19. Januar 2017: Iris Köster [Universität Stuttgart]
- Titel: Sylow Numbers in Character Tables and Integral Group Rings

Donnerstag, 26. Januar 2017: Kein Seminar: 27.-28. Jan. Darstellungstheorietage 2016

Donnerstag, 6. Februar 2017: Magdalena Boos [RUHR- Universtität Bochum]
- Titel: Using quiver representations to prove finiteness criteria

Donnerstag, 9. Februar 2017: Charles Eaton [University of Manchester]
- Titel: Loewy lengths of blocks

Donnerstag, 8. März 2017: Micheal Geline [Northern Illinois University]
- Titel: Some quantitative and qualitative aspects of Knörr lattices

Organisator: Dr. Thomas Gobet und Dr. Caroline Lassueur

Donnerstag, 21. April 2016, 15:30-16:30, Raum 48-582: Paul Balmer (UCLA, Bielefeld)
- Titel: A quick tour of tensor triangular geometry

Donnerstag, 28. April 2016, 17:00-18:00: Jitendra Bajpai (MPI Bonn) - canceled
- Titel: Introduction to the theory of hypergeometric groups

Donnerstag, 5. Mai 2016: no talk (Christi Himmelfahrt)

Mittwoch, 11. Mai 2016, 17:00-18:00, Raum 48-436: Jay Taylor (Padova)
- Titel: Sums of Skew Characters of Symmetric Groups

Donnerstag, 12. May 2016, 17:00-18:00, Raum 48-436: Christopher Voll (Bielefeld)
- Title: Representation growth of finitely generated nilpotent groups

Donnerstag, 19. Juni 2016: no talk because of workshop "Branching problems for reductive groups" at IML

Donnerstag, 26. Juni 2016: no talk because of Fronleichnam

Donnerstag, 2. Juni 2016, 17:00-18:00, Raum 48-436: René Reichenbach (Jena)
- Title: The Broué-Puig *-construction and some applications to 2-blocks

Donnerstag, 26. Januar 2017: Kein Seminar: 27.-28. Jan. Darstellungstheorietage 2016

Donnerstag, 6. Februar 2017: Magdalena Boos [RUHR- Universtität Bochum]
- Titel: Using quiver representations to prove finiteness criteria

Donnerstag, 9. Februar 2017: Charles Eaton [University of Manchester]
- Titel: Loewy lengths of blocks

Donnerstag, 8. März 2017: Micheal Geline [Northern Illinois University]
- Titel: Some quantitative and qualitative aspects of Knörr lattices

Organisator: Dr. Thomas Gobet und Dr. Caroline Lassueur

Donnerstag, 15. Oktober 2015, 16:00-17:00, Raum 48-436: Mikaël Cavallin [EPFL, Ecublens, CH]
- Titel: Restriction of irreducibles and structure of Weyl modules

Donnerstag, 29. Oktober 2015: Philipp Perepelitsky [TU Kaiserslautern]
- Titel: p-permutation equivalences between blocks of finite groups

Donnerstag, 5. November 2015: Benjamin Sambale [TU Kaiserslautern]
- Titel: Broué's Conjecture for sporadic groups

Donnerstag, 12. November 2015: Neil Saunders [EPFL, Ecublens, CH]
- Titel: Irreducible Components of Springer Fibres

Donnerstag, 19. November 2015: Thomas Gobet [TU Kaiserslautern]
- Titel: On twisted filtrations on Soergel bimodules and linear Rouquier complexes

Mittwoch, 25. November 2015: Olivier Dudas [University Paris Diderot - Paris 7, FR]
- Titel: On the unitriangular shape of decomposition matrices for finite reductive groups

Donnerstag, 26. November 2015: Chris Bowman [City University, London, UK]
- Titel: The co-Pieri rule for Kronecker coefficients

Donnerstag, 3. Dezember 2015: Benedetta Lancellotti [Università degli Studi di Milano-Bicocca, IT]
- Titel: Trivial source lattices and a strong form of McKay conjecture

Mittwoch, 9. Dezember 2015, 16:00-17:00, Raum 48-582: Patrick Wegener [Universität Bielefeld]
- Titel: Hurwitz action in Coxeter Groups

Donnerstag, 17. Dezember 2015: Oberseminar Complex Reflection Groups

Donnerstag, 14. Januar 2016: Alessandro Paolini [University of Birmingham, UK]
- Titel: A reduction of characters of Sylow p-subgroups of finite groups of Lie type

Donnerstag, 28. Januar 2016: Oliver Goodbourn [Ruhr-Universität Bochum]
- Titel: Reductive pairs from representations of algebraic groups

Donnerstag, 4. Februar 2016: Julian Brough [TU Kaiserslautern]
- Titel: Determining finite group structure from the size of the conjugacy classes

Donnerstag, 11. Februar 2016: John Murray [Maynooth University, IR]
- Titel: Strong and weak reality and principal indecomposable modules in characteristic 2

Organisator: Dr. habil. Britta Späth und Dr. Caroline Lassueur

Donnerstag, 23. April, 15:30-16:30, Raum 48-582: Ulrike Faltings [TU Kaiserslautern]
- Titel: On the decomposition numbers of F_4(q) for q even

Donnerstag, 30. April, 15:30-16:30, Raum 48-582: Carolina Vallejo [Universitat de València]
- Titel: Coprime action and Brauer characters

Dienstag, 12. Mai, 15:30-16:30, Raum 48-436: Danny Neftin [University of Michigan, Ann Arbor]
- Titel: Monodromy groups of rational functions

Donnerstag, 21. Mai, 15:30-16:30, Raum 48-519: Vivien Ripoll [Universität Wien]
- Titel: Coxeter elements in well-generated complex reflection groups

Donnerstag, 4. Juni: Kein Seminar (Fronleichnam)

Donnerstag, 15:30-16-30, 11. Juni: Amanda Schaeffer Fry [Metropolitan State University Denver]
- Titel: Finite groups with an irreducible character of large degree

Donnerstag, 18. Juni, 17:00-18:00, Raum 48-436: Thomas Gerber [RWTH Aachen]
- Titel: Weak Harish-Chandra theory for finite unitary groups

Donnerstag, 25. Juni, 15:30-16:15: Matthias Klupsch [RWTH Aachen]
- Titel: Supercuspidal modules of finite reductive groups

Donnerstag, 16. Juli, 17:00-18:00, Seminarraum 48-436: Oksana Yakimova [Friedrich-Schiller-Universität Jena]
- Titel: On symmetric invariants of semi-direct products

Donnerstag, 23. Juli: Kein Seminar

Organisator: Dr. habil. Britta Späth und Dr. Caroline Lassueur

Donnerstag, 2. Oktober: Shigeo Koshitani [University of Chiba]
- Titel: Remarks on the Loewy length of a block algebra

Donnerstag, 30. Oktober: Attila Maróti [TU Kaiserslautern]
- Titel: Groups equal to a product of three conjugate proper subgroups

Donnerstag, 6. November: Kein Seminar
- November 7.-8.: Darstellungstheorie-Tage 2014

Donnerstag, 27. November: Imke Toborg [Universität Koblenz-Landau]
- Titel: Local methods need some representation theory to prove Z_3^* results

Donnerstag, 4. Dezember: Kein Seminar
- Dezember 5-6.: Nikolauskonferenz Aachen

Donnerstag, 18. Dezember: Sebastian Herpel [Ruhr-Universität Bochum]
- Titel: Maximal subalgebras of Cartan Type in the exceptional Lie algebras

Donnerstag, 8. Januar: Tommy Hofmann [TU Kaiserslautern]
- Titel: Integrality of Representations of Finite Groups

Donnerstag, 5. Februar, 17:00 Raum 48-436: Eirini Chavli [Université Paris Diderot - Paris 7]
- Titel: The BMR freeness conjecture: the exceptional groups of rank 2

Donnerstag, 19. Februar, 17:00 Raum 48-436: Barbara Baumeister [Universität Bielefeld]
- Titel: Moufang twin buildings and Kac-Moody groups

Organisatoren: Britta Späth und Jay Taylor

24.04.2014, 17:00-18:00 (Room 48-436): Simon Schmider
- Titel: On Auslander-Reiten components for Hecke algebras of type A

08.05.2014, 17:00-18:00 (Room 48-436): Frank Himstedt [TU München]
- Titel: On the decomposition numbers of the groups $\rm SO_7(q)$ and
  $\rm Sp_6(q)$

22.05.2014, 17:00-18:00 (Room 48-436): Erwan Biland [Sherbrooke University, Kanada]
- Titel: Stable equivalences related to the Z*p-theorem

28.05.2014, 17:00-18:00 (Room 48-436): Pablo Luka
- Titel: Vertex-bounded defects

05.06.2014, 15:45-16:45 (Room 48-582): Eugenio Gianelli [Royal Holloway University of London]
- Titel: On permutation modules and decomposition numbers of the symmetric group

05.06.2014, 17:00-18:00 (Room 48-436): Hung P. Tong-Viet [Universität Bielefeld]
- Titel: Some results on Brauer character degrees of finite groups

12.06.2014, 17:00-18:00 (Room 48-436): Martino Garonzi [Università di Padova]
- Titel: Factorizing a group with conjugate subgroups

03.07.2014, 16:00-17:00 (Room 48-582): Giovanna Carnovale [Università di Padova]
- Titel: Conjugacy classes in finite simple groups and pointed Hopf algebras

17.07.2014, 17:00-18:00 (Room 48-436): Martina Lanini [FAU Erlangen-Nürnberg]
- Titel: Finite dimensional representations of rational Cherednik algebras

Organisatorin: Britta Späth

07.11.2013, 15:30-16:030 (Room 48-436): Philipp Perepelitsky
- Titel: $p$-permutation equivalences between blocks of finite groups

14.11.2013, 15:30-16:30 (Room 48-436): Iulian Simion
- Titel: Refining the Bruhat decomposition

21.11.2013: no talk
- Baer Kolloqium (23.11.2013)

28.11.2013, 15:30-16:30 (Room 48-436): Fuat Erdem
- Titel: On the generating graph of a finite group

05.12.2013: no talk
- Titel: Darstellungstheorietage und Nikolauskonferenz

12.12.2013, 16:00-17:00 (Room 48-436): Jürgen Müller
- Titel: The Abelian Defect Group Conjecture for sporadic simple groups

19.12.2013, 15:30-16:30 (Room 48-436): Olivier Dudas
- Titel: Ordering conjugacy classes in Weyl groups

09.01.2014, 15:30-16:30 (Room 48-436): Caroline Lassueur
- Titel: The position of endo-$p$-permutation modules and relatives in the Auslander-Reiten quiver

16.01.2014, 17:00-18:00 (Room 48-436): Serge Bouc
- Titel: The poset of posets

23.01.2014, 15:30-16:30 (Room 48-436): Elisabeth Schulte
- Titel: Alperin's Weight Conjecture - On Inductive Conditions for $G_2(q)$

30.01.2014, 15:30-16:30 (Room 48-436): Burkhard Külshammer
- Titel: Some questions in block theory

10.02.2014, 15:30-16:30 (Room 48-436): Alessandro Paolini [University of Birmingham]
- Titel: A Basis of the Gelfand-Graev Algebra of a Chevalley Group

06.03.2014, 10:30-11:30 (Room 48-436): Michel Enguehard [Institut de Mathematique de Jussiue]
- Titel: Towards a Jordan decomposition of blocks of finite reductive groups

Fachbereich Mathematik

AG Algebra, Geometrie und Computeralgebra