Simone Tagliente

(Rényi Institute of Mathematics and Eötvös Loránd University, Budapest)

terrà un seminario dal titolo:

Exotic 4-manifolds with infinite dihedral fundamental group

di cui riportiamo l'abstract:

We construct infinite families of exotic 4-manifolds with infinite dihedral fundamental group. This group is the non-trivial semi-direct product of Z and Z_2, or equivalently the free product of Z_2 and Z_2.
The key idea of the construction is to assemble simply-connected building blocks to construct the universal cover, and then to perform surgeries in an equivariant way.
The diffeomorphism types of these exotic manifolds are distinguished by the Seiberg-Witten invariants of their double covers, while to show that their homeomorphism type is the same we use a recent result of Hillman-Kasprowski-Powell-Ray.

Vi ricordiamo infine che potrete trovare informazioni sui prossimi seminari sul nostro sito.

Tutte le persone interessate sono invitate a partecipare.

A presto,

Lə organizzatorə