Abstract:Given a knot $K$ in $S^3$, its knot Floer completely determines the bordered Floer homology of its complement by a work of Lipshitz--Ozsváth--Thurston, and the reverse is also true by a work of Kotelskiy--Watson--Zibrowius. Moreover, given a model for $CFK_{\mathcal{R}}(S^3, K)$ there is a completely combinatorial method for producing a model for $\widehat{CFD}(S^3 \smallsetminus K)$. In this paper, we show that a similar formula holds between certain classes of chain endomorphisms of knot Floer chain complex and type D endomorphisms of bordered Floer homology, up to a 1-dimensional ambiguity in the type D side; both the formula and the ambiguity can be computed combinatorially. It follows that, for any concordance from a knot to itself and any satellite pattern, we can combinatorially compute the knot Floer cobordism map of the satellite concordance (up to conjugation) from the knot Floer cobordism map of the given concordance and the bordered Floer homology of the pattern complement.
From: Sungkyung Kang [view email]
[v1]
Mon, 15 Jun 2026 02:27:21 UTC (8,710 KB)
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