The periodic Floer homology conjecture for fibred knots

Let KYK\subset Y be a fibered knot of genus gg, with monodromy φ\varphi, and let TφT_\varphi denote its mapping torus. Write Y\overline{Y} and K\overline{K} for the orientation reversals of YY and KK, respectively, and let HFK^(Y,K,i)\widehat{HFK}(\overline{Y},\overline{K},i) be the hat version of knot Floer homology in Alexander grading ii. The group PFHi+g(Tφ)PFH_{i+g}^\sharp(T_\varphi) is the sharp-version of periodic Floer homology in degree i+gi+g. The periodic Floer homology conjecture. If KYK\subset Y is a fibered knot with monodromy φ\varphi, then

HFK^(Y,K,i)PFHi+g(Tφ).\widehat{HFK}(\overline{Y},\overline{K},i)\cong PFH_{i+g}^\sharp(T_\varphi).

This is proposed by comparing sharp periodic Floer homology with sharp embedded contact homology and sutured contact homology. The source does not provide a resolution, so the conjecture remains open.

Sources & referencesView supporting material

Primary source

Paolo Ghiggini and Gilberto Spano, “Knot Floer homology of fibred knots and Floer homology of surface diffeomorphisms”, arXiv:2201.12411 (2022).

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