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# Sam Raskin "Twisted cohomology of Zastava spaces and the semi-infinite flag variety"

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Salle 314 (IHP)
### Salle 314

#### IHP

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Sam Raskin (MIT)

Twisted cohomology of Zastava spaces and the semi-infinite flag variety

Zastava spaces were defined by Finkelberg-Mirkovic as the intersection of certain almost transverse affine space orbits in the affine Grassmannian.

We'll discuss the computation of "twisted de Rham cohomology" (to be defined in the talk) of these Zastava spaces. We will then give an application to some problems in infinite-dimensional algebraic geometry.

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