A link surgery spectral sequence in monopole Floer homology

Abstract

To a link L in the 3-sphere, we associate a spectral sequence whose E^2 page is the reduced Khovanov homology of L and which converges to a version of the monopole Floer homology of the branched double cover. The pages E^k for k > 1 depend only on the mutation equivalence class of L. We define a mod 2 grading on the spectral sequence which interpolates between the delta-grading on Khovanov homology and the mod 2 grading on Floer homology. We also derive a new formula for link signature that is well-adapted to Khovanov homology. More generally, we construct new bigraded invariants of a framed link in a 3-manifold as the pages of a spectral sequence modeled on the surgery exact triangle. The differentials count monopoles over families of metrics parameterized by permutohedra. We utilize a connection between the topology of link surgeries and the combinatorics of graph associahedra. This also yields simple realizations of permutohedra and associahedra, as refinements of hypercubes.

76 pages, 26 figures (v2: added 4 figures and Section 8.1 on realizations. v3: added table of figures, modified intro and figures 20 and 25)

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• Computations of Szabó's Geometric Spectral Sequence in Khovanov Homology
• Categorical lifting of the Jones polynomial: a survey
• Reconnectads