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Topics in Combinatorial Representation Theory
Mar 17, 2008 to Mar 21, 2008

Organizer(s)

Sergey Fomin, Bernard Leclerc, Vic Reiner (Chair), Monica Vazirani
To apply for funding, you must register by Fri, Jan 25 2008.
Representation theory has often been a key to unlocking problems of enumeration and structure for our favorite combinatorial objects. In the reverse direction, answering many of the central questions of representation theory required development of sophisticated combinatorial techniques and constructions. This interplay, which has only intensified in recent years, will be at the focus of the workshop.

Potential topics to be discussed include (the combinatorial aspects of):
  • quiver representations;
  • cluster algebras;
  • Macdonald and LLT polynomials;
  • representation-theoretic techniques in quantum/statistical mechanics;
  • generalized Littlewood-Richardson rules, Schur-positivity, and connections with Schubert calculus;
  • crystal bases and graphs;
  • affine Grassmannians, Mirkovic-Vilonen cycles;
  • dual canonical and semi-canonical bases;
  • Horn and Deligne-Simpson problems;
  • tropical calculus in representation theory.

A relatively small number of talks should leave ample time for informal discussions and presentations.


INVITED SPEAKERS:

Harm Derksen (Univ. of Michigan- Ann Arbor)
Philippe Di Francesco (CNRS- Saclay)
Mark Haiman (Univ. of California- Berkeley)
Joel Kamnitzer (Univ. of California- Berkeley, American Inst. of Math.)
Michael Kapovich (Univ. of California- Davis)
Rinat Kedem (Univ. of Illinois- Urbana)
Thomas Lam (Harvard Univ.)
Cristian Lenart (SUNY- Albany)
George Lusztig (MIT)
Alexander Postnikov (MIT)
Arun Ram (Univ. of Wisconsin- Madison, Univ. of Melbourne)
Anne Schilling (Univ. of California- Davis)
Jan Schroer (Univ. of Bonn)
Mark Shimozono (Virginia Tech)
David Speyer (Clay Math Inst., MIT)
John Stembridge (Univ. of Michigan- Ann Arbor)
Anatoly Vershik (Steklov Institute- St. Petersburg)
Andrei Zelevinsky (Northeastern Univ.)


A block of rooms has been reserved at the Rose Garden Inn. Reservations may be made by calling 1-800-992-9005 OR directly on their website. Click on Corporate at the bottom of the screen and when prompted enter code MATH (this code is not case sensitive). By using this code a new calendar will appear and will show MSRI rate on all room types available. The following Group Code should be entered in the "Comment" field when booking through our Website. Group Code = CGMS57.
The cut-off date for reservations is March 2, 2008.

A block of rooms has been reserved at the Hotel Durant. Please mention the workshop name and reference the following code when making reservations via phone, fax or e-mail: ER0000. The cut-off date for reservations is February 15, 2008.

Funding

To apply for funding, you must register by Fri, Jan 25 2008. Click to Register
Students, recent Ph.D.'s, women, and members of underrepresented minorities are particularly encouraged to apply. Funding awards are made typically 6 weeks before the workshop begins. Requests received after the funding deadline are considered only if additional funds become available.
Schedule
Monday, March 17, 2008
9:15AM - 10:30AM John Stembridge Admissible W-graphs [Video available]
11:00AM - 12:00PM Thomas Lam Hopf algebras, Towers of Algebras and Dual graded graphs [Video available]
2:00PM - 3:00PM Michael Kapovich Restrictions of irreducible representations to Levi subgroups and ideal triangles in Euclidean buildings [Video available]
4:00PM - 5:00PM George Lusztig Unipotent classes and special Weyl group representations [Video available]
Tuesday, March 18, 2008
9:30AM - 10:30AM Andrei Zelevinsky Combinatorics of Coxeter elements and cluster algebras of finite type [Video available]
11:00AM - 12:00PM Jan Schroeer Dual semicanonical bases and cluster algebras [Video available]
2:00PM - 3:00PM Alexander Postnikov Total positivity, matroids, and clusters [Video available]
4:00PM - 5:00PM David Speyer Sortable elements -- beyond finite type [Video available]
Wednesday, March 19, 2008
9:30AM - 10:30AM Arun Ram Path models [Video available]
11:00AM - 12:00PM Cristian-Paul Lenart Hall-Littlewood polynomials, alcove walks, and the Macdonald polynomial inv statistic [Video available]
Thursday, March 20, 2008
9:30AM - 10:30AM Anne Schilling Schubert Polynomials for the affine Grassmannian of the symplectic group [Video available]
11:00AM - 12:00PM Mark Shimozono k-Schur functions via multidegrees of Matrix Affine Schubert Varieties [Video available]
2:00PM - 3:00PM Mark Haiman LLT polynomials [Video available]
Friday, March 21, 2008
9:30AM - 10:30AM Philippe di Francesco The Razumov-Stroganov conjecture: loop gas, alternating sign matrices, plane partitions and orbital varieties [Video available]
11:00AM - 12:00PM Rinat Kedem Quantum algebra characters and cluster algebras [Video available]
2:00PM - 3:00PM Harm Derksen Quivers with Potentials [Video available]
4:00PM - 5:00PM Anatoly Vershik Some Problems of Asymptotic Representation Theory (ART) [Video available]
Parent Program(s):
Combinatorial Representation Theory


Questions about this workshop should be sent either by email to
or by regular mail to:
Topics in Combinatorial Representation Theory
Mathematical Sciences Research Institute
17 Gauss Way, Berkeley, CA
94720-5070.
USA

The Institute is committed to the principles of Equal Opportunity and Affirmative Action.



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