The braid-group action conjecture for link Floer chain complexes

Let (Y,L,p)(Y,L,p) be a pointed link, let ρ(σi)\rho(\sigma_i) denote the automorphism induced by the braid-group generator σi\sigma_i, and let Ψi\Psi_i and Φi\Phi_i be the maps defining the basepoint-moving automorphism on CFL(Y,L,p)\mathit{CFL}(Y,L,p). Write N(K(Al))N(K(\mathcal{A}_l)) for the relevant homotopy category and AutN(K(Al))(CFL(Y,L,p))\operatorname{Aut}_{N(K(\mathcal{A}_l))}(\mathit{CFL}(Y,L,p)) for its automorphism group.

Braid-group action conjecture. The two automorphisms ρ(σi)\rho(\sigma_i) and Id+ΨiΦi\operatorname{Id}+\Psi_i\Phi_i in AutN(K(Al))(CFL(Y,L,p))\operatorname{Aut}_{N(K(\mathcal{A}_l))}(\mathit{CFL}(Y,L,p)) are equal.

This conjecture predicts that the automorphism arising from moving the basepoint agrees with the automorphism associated to the braid-group action. It is motivated in the source by the preceding theorem on the induced action, but no resolution is supplied here.

Sources & referencesView supporting material

Primary source

Sucharit Sarkar, “Moving basepoints and the induced automorphisms of link Floer homology”, arXiv:1109.2168 (2011).

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