Rational equivariant cohomology theories, Hasse squares, and rigidity of derived categories

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• John Greenlees (Sheffield)
• Wednesday 24 November 2010, 14:15-15:15
• MR13, CMS.

If you have a question about this talk, please contact Burt Totaro.

The main result (with Brooke Shipley) is a complete and calculable algebraic model of rational equivariant cohomology theories for tori. The formal framework of the result may be of wider interest, since it is based on patching together rigidity statements for commutative DGAs with polynomial cohomology (for example this applies to derived categories of sheaves over an elliptic curve).

This talk is part of the Algebraic Geometry Seminar series.

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