Greedy matching conjecture for delooped Khovanov complexes

Let TT be a tangle diagram, let ΨT\Psi\llbracket T\rrbracket be its delooped Khovanov complex, and let MgrM_{\operatorname{gr}} be the greedy partial matching on the graph G(ΨT)G(\Psi\llbracket T\rrbracket).

Greedy matching conjecture. For any tangle diagram TT, the greedy matching MgrM_{\operatorname{gr}} is a Morse matching on the delooped Khovanov complex ΨT\Psi\llbracket T\rrbracket.

The construction automatically satisfies the finiteness, matching, and isomorphism conditions of discrete Morse theory; the unresolved issue is the absence of directed cycles. The claim would imply acyclicity of the greedy matching for every tangle diagram.

Sources & referencesView supporting material

Primary source

Tuomas Kelomäki, “Morse matchings and Khovanov homology of 4-strand torus links”, arXiv:2507.15060 (2025).

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