SMS scnews item created by James East at Mon 2 Nov 2009 1454
Type: Seminar
Distribution: World
Expiry: 6 Nov 2009
Calendar1: 6 Nov 2009 1205-1255
CalLoc1: Carslaw 375

Algebra Seminar

Laumon resolutions and quiver varieties

Michael Finkelberg

Friday November 6, 12:05--12:55pm, Carslaw 375


Laumon moduli spaces parametrize certain parabolic torsion free sheaves on the projective plane. They are semismall resolutions of Drinfeld compactifications of the mapping spaces from P^1 to certain flag varieties. They are important objects of geometric representation theory, playing a prominent role in the computation of quantum cohomology of flag varieties, in the construction of the affine Gelfand-Tsetlin base, etc. We advocate a new viewpoint on them from the perspective of quiver varieties, allowing to prove the normality of Drinfeld compactifications, and to construct many more resolutions connected by sequences of flops.


After the seminar we will take the speaker to lunch.

See the Algebra Seminar web page for information about other seminars in the series.

James East

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