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Boundary Dehn twists on Milnor fibers and Family Bauer--Furuta invariants (2410.21742v1)
Published 29 Oct 2024 in math.GT
Abstract: We proved that the boundary Dehn twist on the Milnor fiber $M_c(2, q, r)$ is an exotic diffeomorphism relative to the boundary if $q, r$ are odd, coprime integers bigger than $3$ and $(q-1)(r-1)/4$ is an odd number. The proof is given by comparing the family relative Bauer--Furuta invariants of the mapping torus.
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