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arXiv:2001.08771 [math.GT]AbstractReferencesReviewsResources

The Dehn twist on a sum of two K3 surfaces

Peter Kronheimer, Tomasz Mrowka

Published 2020-01-23Version 1

Ruberman gave the first examples of self-diffeomorphisms of four-manifolds that are isotopic to the identity in the topological category but not smoothly so. We give another example of this phenomenon, using the Dehn twist along a 3-sphere in the connected sum of two K3 surfaces.

Comments: 15 pages
Categories: math.GT, math.DG
Subjects: 57R57, 57R50, 57R52
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