Real monopole–Heegaard Floer homology isomorphism conjecture

From papers

Let (Y,ι)(Y,\iota) be a real three-manifold with a compatible real spinc\mathrm{spin^c} structure s\mathfrak{s}. Let HMR~\widetilde{\mathit{HMR}}, HMRˇ\widecheck{\mathit{HMR}}, HMR^\widehat{\mathit{HMR}}, and HMR\overline{\mathit{HMR}} denote the real monopole Floer homology variants, and let HFR^\widehat{\mathit{HFR}}, HFR+\mathit{HFR}^{+}, HFR\mathit{HFR}^{-}, and HFR\mathit{HFR}^{\infty} denote the corresponding real Heegaard Floer variants. Real Floer theories isomorphism conjecture. For a real rational homology three-sphere, or more generally any real three-manifold, there should be isomorphisms

HMR~(Y,ι,s)HFR^(Y,ι,s),HMRˇ(Y,ι,s)HFR+(Y,ι,s),\widetilde{\mathit{HMR}}(Y,\iota,\mathfrak{s})\cong \widehat{\mathit{HFR}}(Y,\iota,\mathfrak{s}),\qquad \widecheck{\mathit{HMR}}(Y,\iota,\mathfrak{s})\cong \mathit{HFR}^{+}(Y,\iota,\mathfrak{s}), HMR^(Y,ι,s)HFR(Y,ι,s),HMR(Y,ι,s)HFR(Y,ι,s).\widehat{\mathit{HMR}}(Y,\iota,\mathfrak{s})\cong \mathit{HFR}^{-}(Y,\iota,\mathfrak{s}),\qquad \overline{\mathit{HMR}}(Y,\iota,\mathfrak{s})\cong \mathit{HFR}^{\infty}(Y,\iota,\mathfrak{s}).

These should be isomorphisms of F2{\mathbb F}_2-vector spaces or modules over a suitable ring. The conjecture is presented as a real analogue of the isomorphism between ordinary monopole and Heegaard Floer homologies.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

Yonghan Xiao, “The equivalence between two real Seiberg-Witten Floer homologies”, arXiv:2510.03709 (2026).

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