Posted in

Speaker:

Noémie Combe
Affiliation:

MPI MiS, Leipzig
Date:

Tue, 2020-10-06 14:00 - 15:00 A paracomplex Deligne—Mumford stack is considered. This structure introduces additional conical singularities, in the neighbourhood of which the curvature is negative. In particular, properties are investigated and we establish a relationship between the paracomplex Deligne—Mumford stack and classical Deligne—Mumford stack. Moreover, we show that the NY Gravity operad associated to this space (introduced by Manin and Combe) has a mixed Hodge structure. In this framework, the strong Hodge theorem extends and the pure Hodge structure (Kähler package) holds. Since we use tools from L^2 cohomology, a parallel with the model of Atiyah—Hitchin and Donaldson is established.

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