From flops to diffeomorphism groups

Smirnov, Gleb¹

¹ Department of Mathematics, ETH Zürich, Zürich, Switzerland

Geometry & topology, Tome 26 (2022) no. 2, pp. 875-898.

Résumé

We exhibit many examples of closed complex surfaces whose diffeomorphism groups are not simply connected and which contain loops that are not homotopic to loops of symplectomorphisms.

Détail

DOI : 10.2140/gt.2022.26.875

Keywords: diffeomorphism groups, Seiberg–Witten invariants, flop

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