Band sums of links which yield composite links. The cabling conjecture for strongly invertible knots

Eudave Muñoz, Mario

doi:10.1090/S0002-9947-1992-1112545-X

Band sums of links which yield composite links. The cabling conjecture for strongly invertible knots
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Trans. Amer. Math. Soc. 330 (1992), 463-501 Request permission

Abstract:

We consider composite links obtained by bandings of another link. It is shown that if a banding of a split link yields a composite knot then there is a decomposing sphere crossing the band in one arc, unless there is such a sphere disjoint from the band. We also prove that if a banding of the trivial knot yields a composite knot or link then there is a decomposing sphere crossing the band in one arc. The last theorem implies, via double branched covers, that the only way we can get a reducible manifold by surgery on a strongly invertible knot is when the knot is cabled and the surgery is via the slope of the cabling annulus.

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