Detecting Whitney disks for link maps in the four-sphere
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DOI: 10.1142/s0218216517500778
Abstract: It is an open problem whether Kirk’s σ-invariant is the complete obstruction to a link map f : S+2 ∪ S −2 → S4 being link homotopic to the trivial link. The link homotopy invariant… read more here.
Keywords: whitney disks; link; link homotopy; link map ... See more keywords