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Double plumbings of disk bundles over spheres

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arxiv 1403.5904 v2 pith:5RHSFD53 submitted 2014-03-24 math.GT

classification math.GT
keywords bundlesdiskspheresdoubleplumbingsclassespairplumbing
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abstract

We consider double plumbings of two disk bundles over spheres. We calculate the Heegaard-Floer homology with its absolute grading of the boundary of such a plumbing. Given a closed smooth 4-manifold $X$ and a suitable pair of classes in $H_{2}(X)$, we investigate when this pair of classes may be represented by a configuration of surfaces in $X$ whose regular neighbourhood is a double plumbing of disk bundles over spheres. Using similar methods we study single plumbings of two disk bundles over spheres inside $X$.

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  1. On $h$-cobordisms of complexity $2$

    math.GT 2025-01 conditional novelty 7.0 of 10

    Computes the monopole Floer homology and twisting involution of the complexity-2 protocork boundary, and constructs h-cobordisms of arbitrarily large Morgan-Szabó complexity between exotic pairs of closed 1-connected ...

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