The exterior-algebra module refinement of Némethi's conjecture

From papers

Let GG be a plumbing tree, let Y(G)Y(G) be its associated plumbed 3-manifold, and let HF(Y(G))\boldsymbol{\mathbf{\mathit{HF}}}^-(Y(G)) denote the completed Heegaard Floer homology. Write Tors\operatorname{Tors} for the torsion subgroup of H1(Y(G))H_1(Y(G)), and let ΛH1(Y(G))/Tors\Lambda^* H_1(Y(G))/\operatorname{Tors} act through the H1(Y(G))/TorsH_1(Y(G))/\operatorname{Tors} actions on the two theories. Némethi's module-structure conjecture. HF(Y(G))\boldsymbol{\mathbf{\mathit{HF}}}^-(Y(G)) is isomorphic to HF(G)\mathbb{HF}(G) as a module over

F[[U]]ΛH1(Y(G))/Tors.\mathbb{F}[[U]]\otimes \Lambda^* H_1(Y(G))/\operatorname{Tors}.

This refines the lattice-homology conjecture when b1(Y(G))>0b_1(Y(G))>0 by requiring compatibility with the exterior-algebra action, beyond the underlying F[[U]]\mathbb{F}[[U]]-module isomorphism. The source does not state a resolution of this refinement.

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Sources & referencesView supporting material

Primary source

Ian Zemke, “The equivalence of lattice and Heegaard Floer homology”, arXiv:2111.14962 (2024).

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