Milnor's invariants for knots and links in closed orientable 3-manifolds

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Main Author: Stees, Ryan
Format: Preprint
Published: 2023
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_version_ 1866909013715714048
author Stees, Ryan
author_facet Stees, Ryan
contents In his 1957 paper, John Milnor introduced a collection of invariants for links in $S^3$ detecting higher-order linking phenomena by studying lower central quotients of link groups and comparing them to those of the unlink. These invariants, now known as Milnor's $\overlineμ$-invariants, were later shown to be topological link concordance invariants and have since inspired decades of consequential research. Milnor's invariants have many interpretations, and there have been numerous attempts to extend them to other settings. In this paper, we extend Milnor's invariants to topological concordance invariants of knots and links in general closed orientable 3-manifolds. These invariants unify and generalize all previous versions of Milnor's invariants in dimension 3, including Milnor's original invariants for links in $S^3$.
format Preprint
id arxiv_https___arxiv_org_abs_2310_10918
institution arXiv
publishDate 2023
record_format arxiv
spellingShingle Milnor's invariants for knots and links in closed orientable 3-manifolds
Stees, Ryan
Geometric Topology
57K10, 57K31, 57K40
In his 1957 paper, John Milnor introduced a collection of invariants for links in $S^3$ detecting higher-order linking phenomena by studying lower central quotients of link groups and comparing them to those of the unlink. These invariants, now known as Milnor's $\overlineμ$-invariants, were later shown to be topological link concordance invariants and have since inspired decades of consequential research. Milnor's invariants have many interpretations, and there have been numerous attempts to extend them to other settings. In this paper, we extend Milnor's invariants to topological concordance invariants of knots and links in general closed orientable 3-manifolds. These invariants unify and generalize all previous versions of Milnor's invariants in dimension 3, including Milnor's original invariants for links in $S^3$.
title Milnor's invariants for knots and links in closed orientable 3-manifolds
topic Geometric Topology
57K10, 57K31, 57K40
url https://arxiv.org/abs/2310.10918