Symplectic isotopy on non-minimal ruled surfaces (2010.04616v2)

Published 9 Oct 2020 in math.SG

Abstract: We prove the stability of $Symp(X,\omega)\cap Diff_0(X)$ for a one-point blow-up of irrational ruled surfaces and study their topological colimit. Non-trivial generators of $\pi_0[Symp(X,\omega)\cap Diff_0(X)]$ that differ from Lagrangian Dehn twists are detected.

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