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Takahiro Matsuyuki: Graph complex and characteristic map of a fiber bundle

Tid: On 2018-08-22 kl 10.00 - 12.00

Plats: Room 22, House 5, Kräftriket, Department of Mathematics, Stockholm University

Medverkande: Takahiro Matsuyuki

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ABSTRACT:We construct a certain graph complex and a chain map from the complex to the Chevalley-Eilenberg double complex of the dgl of symplectic derivations on a free dgl. It is known that the target of the map is related to characteristic classes of a fibration whose fiber is a 1-punctured even-dimensional manifold. For example, we shall see the case that fiber is a 1-punctured complex projective space if time allows.