Workshop "Gradings and Decomposition Numbers"

Workshop "Gradings and Decomposition Numbers"

September 24-28, 2012, Universität Stuttgart, Germany

Invited Speakers	Peter Fiebig University Erlangen-Nürnberg, Germany Meinolf Geck, Aberdeen University, Scotland, UK David Hemmer, University of Buffalo, SUNY, USA Jun Hu, Beijing Institute of Technology, China and University of Sydney, Australia Alexander Kleshchev, University of Oregon, USA Aaron Lauda, University of Southern California, USA Gunter Malle, University of Kaiserslautern, Germany Andrew Mathas, University of Sydney, Australia Volodymyr Mazorchuk, University of Uppsala, Sweden Wolfgang Soergel, University of Freiburg, Germany Catharina Stroppel, University of Bonn, Germany Weiqiang Wang, University of Virginia, USA

Talks	Some of the speakers kindly allowed us to post their talks here: Chris Bowman: Decomposition numbers of cyclotomic Brauer algebras Aaron Chan : Ext-algebra of standard modules fpr rhombal algebras Michael Ehrig: Diagramatic description of parabolic category O in type (D(n),A(n-1)) Thangavelu Geetha: Cellularity of Wreath Product algebras Qiong Guo: On teh U-module structure of the unipotent Specht modules for finite general linear groups Jun Hu: Quiver Schur algebras Johannes Kübel: Tilting modules and sheaves on moment graphs Andrew Mathas: Cyclotomic quiver Schur algebras and quiver Hecke algebras of type A: Part I Andrew Mathas: Cyclotomic quiver Schur algebras and quiver Hecke algebras of type A: Part II Volodymyr Mazorchuk: Endomorphisms of cell 2-representations Leonard Scott: Forced gradings, p-filtrations and Koszul-like algebras

Pictures	Pictures from the workshop

Schedule and abstracts	Schedule of talks Book of abstracts

Information for participants	Please find here some useful information on how to get to the workshop.

Time and Venue	The workshop will begin Monday, September 24, around 1pm, and end Friday, September 28, around 1pm. It will take place at the University of Stuttgart, Germany, on the Campus Vaihingen.

How to get there	For arrival information from Stuttgart airport or Stuttgart Hauptbahnhof (main railway station), please see here. Frankfurt airport is a little more than an hour distance by train from Stuttgart Hauptbahnhof (for train timetables and reservations check the website of Deutsche Bahn). For further information please contact the organizers.

Registration	If you plan to take part in this workshop please register by writing an email to grad2012 at mathematik dot uni minus stuttgart dot de. There will be contributed talks of approx. 25 minutes length. Please indicate if you are interested in contributing a talk until August 28, 2012. If so, please send us a tentative title and abstract. There is a plan of going for dinner on Wednesday evening. Please include in your email whether you would be interested in joining. Deadline for registration is September 2, 2012. Limited financial support is expected to be available, in particular for PhD students and postdocs. It will usually cover the cost of accommodation, while travel expenses should be paid by the participants' home institution whenever possible. Please indicate in your registration email if you would like to apply for financial support. Deadline for applications for financial support is July 25, 2012. Note that the deadline for applications for financial support has expired.

Registered Participants	A list of registered participants can be found here.

Accommodation	For the invited speakers, rooms will be booked by the organizers. All other participants are asked to contact a hotel directly. When booking your room, please state that you are a guest of the university and participant of the workshop organized by the Institut für Algebra and Zahlentheorie (IAZ). Here are some options: Römerhof (Robert-Leicht-Straße 93, 70563 Stuttgart-Vaihingen, +49 711 / 687880): In 15 minutes walking distance from the institute, there is also a bus connection. There are smaller rooms for € 74.80 per night and larger rooms for € 81.80. Relexa Waldhotel Schatten (Magstadter Straße 2-4, 70569 Stuttgart, +49 / 71168670): This hotel is located in Büsnau, 30 minutes walking distance from the institute. Alternatively, there is also a bus connection. There is a pre-reservation for rooms until August 24, 2012. If you intend to reserve a room here by eMail or phone, please indicate the codeword "IAZ" in your reservation to get the reduced rate of € 79 for a single economy room or € 99 for a superior room per night. International Student Hotel (Neckarstraße 172, 70190 Stuttgart, +49 711 / 414300): Located in the city centre, in 15 minutes walking distance from the main train station; 25 minutes with U-Bahn and S-Bahn from our institute. There are ensuite double rooms for € 63 per night and room, ensuite single rooms for € 49 per night including breakfast. Rates for students are € 10 lower. The rooms should be reserved until June 15, 2012. Kulinarium an der Glems (Mahdentalstraße 111, 70569 Stuttgart, +49 711 /681618 ): Single rooms for € 68 can be reserved until July 23, 2012. There is a bus connection to the university, it takes approximately 15 minutes. Hotel Drive-in (Glockenblumenstraße 1, 70563 Stuttgart, +49 711 / 38910455): Single rooms for € 71 can be reserved until August 24, 2012. The university is a 30 minutes walk away, it can also be reached in 15 minutes by S-Bahn. IB-Hotel am Wallgraben (Wallgraben 119, 70565 Stuttgart, +49 711 / 7876100): Single rooms for € 65 (breakfast costs additionally € 10) can be reserved until August 27, 2012. The university can be reached in 15 minutes by S-Bahn. Pullman Stuttgart Fontana ( Vollmoellerstraße 5, 70563 Stuttgart, +49 711 / 7302300): Single rooms for € 119 (breakfast costs additionally € 20) can be reserved until June 22, 2012. The university can be reached in 10 minutes by S-Bahn, or by a 30 minute walk. Arcona Mo Hotel ( Hauptstraße 26, 70563 Stuttgart, +49 711 / 28056100): Single rooms for € 129 including breakfast, can be reserved until August 27, 2012. The university can be reached in 10 minutes by S-Bahn, or by a 30 minute walk.

Organizing Committee	Richard Dipper, Universität Stuttgart, Germany Anne Henke, University of Oxford, UK Steffen Koenig, Universität Stuttgart, Germany

Local Organizing Committee	Elke Gangl (Conference secretary) Qiong Guo Robert Hartmann Markus Jedlitschky Armin Shalile

Acknowledgment	The workshop is supported by the DFG through the priority programs SPP 1388 'Representation Theory' and SPP 1489 'Algorithmic and Experimental Methods in Algebra, Geometry and Number Theory', and also by the Department of Mathematics in Stuttgart.

Contact	In case of any questions please contact grad2012 at mathematik dot uni minus stuttgart dot de.

IAZ / Fachbereich Mathematik