The Dehn twist on a sum of two K3 surfaces

Author(s)
Kronheimer, PB; Mrowka, TS
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Abstract
Ruberman gave the first examples of self-diffeomorphisms of fourmanifolds 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.
Date issued
2020
URI
https://hdl.handle.net/1721.1/133377
Department
Massachusetts Institute of Technology. Department of Mathematics
Journal
Mathematical Research Letters
Publisher
International Press of Boston
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