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- W2032094390 abstract "We study link-homotopy classes of links in the three sphere using reduced groups endowed with peripheral structures derived from meridian-longitude pairs. Two types of peripheral structures are considered — Milnor’s original version (called “pre-peripheral structures” in Levine’s terminology) and Levine’s refinement (called simply “peripheral structures”). We show here that pre-peripheral structures are not strong enough to classify links up to link-homotopy, and that Levine’s peripheral structures, although strong enough to distinguish those classes not distinguished by pre-peripheral structures, are also in all likelihood not strong enough to distinguish all link-homotopy classes. Following Levine’s classification program, we compare structure-preserving and realizable automorphisms, using an obstruction-theoretic approach suggested by work of Habegger and Lin. We find that these automorphism groups are in general different, so that a more complex program for classification by structured groups is required." @default.
- W2032094390 created "2016-06-24" @default.
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- W2032094390 date "1993-03-01" @default.
- W2032094390 modified "2023-10-18" @default.
- W2032094390 title "STRUCTURED GROUPS AND LINK-HOMOTOPY" @default.
- W2032094390 doi "https://doi.org/10.1142/s0218216593000040" @default.
- W2032094390 hasPublicationYear "1993" @default.
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