The Dold-Whitney theorem and the Sato-Levine invariant
Lobb, Andrew
Original · EN
We use the Dold-Whitney theorem classifying SO(3)-bundles over a 4-complex to give a mod 4 obstruction to a 2-component link of trivial linking number being slice. It turns out that this coincides with the reduction of the Sato-Levine invariant.
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