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On 2-knots and connected sums with projective planes

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arxiv 1901.10972 v1 pith:D6MQSVLM submitted 2019-01-30 math.GT

classification math.GT
keywords projectiveconnectedknotplanesatohsphereunknottedadditionally
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abstract

In this paper, we generalize a result of Satoh to show that for any odd natural $n$, the connected sum of the $n$-twist spun sphere of a knot $K$ and an unknotted projective plane in the 4-sphere is equivalent to the same unknotted projective plane. We additionally provide a fix to a small error in Satoh's proof of the case that $K$ is a 2-bridge knot.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Exotic disks and singular instanton Floer homology

    math.GT 2026-06 unverdicted novelty 7.0 of 10

    Singular instanton Floer homology produces exotic pairs of slice disks for a strongly invertible Z-slice knot whose symmetric disks stay exotic under stabilizations by definite 4-manifolds or projective planes.

  2. More Exotic $\mathbb{RP}^2$-knots and Homotopy Spheres

    math.GT 2025-07 conditional novelty 7.0 of 10

    For every integer s, the branched double cover of the roll-spun Montesinos knot K(2,3,|6s+1|) is a homotopy 4-sphere, giving infinitely many exotic topologically unknotted RP^2-knots in S^4 with all odd Seiberg-Witten...

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