Floer simplicity detected by weak order-detected slopes

Let MM be a knot manifold. Write S(M)\mathcal{S}(M) for the set of slopes on M\partial M, Dordwk(M)\mathcal{D}_{ord}^{wk}(M) for the set of weakly order-detected slopes, and LO(M)LO(M) for the space of left-orders on π1(M)\pi_1(M). Floer simplicity conjecture. The manifold MM is Floer simple if and only if

Dordwk(M)S(M),\mathcal{D}_{ord}^{wk}(M)\ne\mathcal{S}(M),

and therefore each oLO(M)\mathfrak{o}\in LO(M) is boundary-cofinal. The conjecture is motivated by the analogous characterization in Heegaard Floer theory; the stated boundary-cofinality consequence is supported by the paper's sufficient condition involving slopes that are not weakly order-detected.

Sources & referencesView supporting material

Primary source

Steven Boyer and Adam Clay, “Order-detection of slopes on the boundaries of knot manifolds”, arXiv:2206.00848 (2022).

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