Journal
JOURNAL OF TOPOLOGY
Volume 7, Issue 2, Pages 287-326Publisher
WILEY
DOI: 10.1112/jtopol/jtt030
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Funding
- NSF [DMS-0739392]
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [0739392] Funding Source: National Science Foundation
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We define a concordance invariant, epsilon(K), associated to the knot Floer complex of K, and give a formula for the Ozsvath-Szabo concordance invariant tau of K-p,K-q, the (p, q)-cable of a knot K, in terms of p, q, tau(K), and epsilon(K). We also describe the behavior of epsilon under cabling, allowing one to compute tau of iterated cables. Various properties and applications of epsilon are also discussed.
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