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Details of Grant 

EPSRC Reference: GR/R86546/01
Title: Representation Theory and Geometry: Generalized Steinberg Varieties
Principal Investigator: Roehrle, Professor G
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: School of Mathematics
Organisation: University of Birmingham
Scheme: Fast Stream
Starts: 25 March 2003 Ends: 24 March 2006 Value (£): 61,793
EPSRC Research Topic Classifications:
Algebra & Geometry
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
The proposal is concerned with computing topological invariants, namely homology and K-theory of generalized Steinberg varieties and the representation theoretic relevance of these varieties. We hope that a better understanding of the Borel-Moor homology and equivariant K-groups of these varieties will provide a link between Springer representations of parabolic subgroups of the Weyl group and representations of the underlying reductive group G.In a second part we study the relationship between the set of abelian ideals of a Borel subalgebra of a semisimple complex Lie algebra and the Bruhat order on the set of minuscule elements of the associated affine Weyl group.In a third part we are concerned with the Auslander-Reiten theory of higher Frobenius kernels of reductive algebraic groups in positive characteristic. Specifically we want to study the rank varieties of baby Verma modules of semisimple groups of rank 2 and determine the tree class of their Auslander-Reiten components.
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Organisation Website: http://www.bham.ac.uk