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LINEAR INDEPENDENCE IN THE RATIONAL HOMOLOGY COBORDISM GROUP

Published online by Cambridge University Press:  28 August 2019

Marco Golla
Affiliation:
CNRS, Laboratoire de Mathématiques Jean Leray, Nantes, France (marco.golla@univ-nantes.fr)
Kyle Larson
Affiliation:
Alfréd Rényi Institute of Mathematics, Budapest, Hungary (larson@renyi.mta.hu)

Abstract

We give simple homological conditions for a rational homology 3-sphere $Y$ to have infinite order in the rational homology cobordism group $\unicode[STIX]{x1D6E9}_{\mathbb{Q}}^{3}$, and for a collection of rational homology spheres to be linearly independent. These translate immediately to statements about knot concordance when $Y$ is the branched double cover of a knot, recovering some results of Livingston and Naik. The statements depend only on the homology groups of the 3-manifolds, but are proven through an analysis of correction terms and their behavior under connected sums.

Type
Research Article
Copyright
© Cambridge University Press 2019

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