Hexality conjecture for bicontact forms on the surgered 3-torus

From papers

Let T3=R3/Z3T^3=\boldsymbol{R}^3/\boldsymbol{Z}^3 and suppose nx>0n_x>0, ny<0n_y<0, and nz>0n_z>0. Let Mnx,ny,nzM_{n_x,n_y,n_z} be the result of the specified surgeries on the coordinate curves, with Anosov flows ϕxy\phi_{xy} and ϕyz\phi_{yz} obtained from the two surgery descriptions. A bicontact Reeb-flow conjecture. There exists a bicontact form (α+,α)(\alpha_+,\alpha_-) supporting ϕxy\phi_{xy} such that the Reeb flow R+R_+ of α+\alpha_+ is isotopically equivalent to ϕyz\phi_{yz}. This is the first proposed instance of the paper’s hexality picture, in which the two Anosov flows exchange roles with positive Reeb flows; it remains open.

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Sources & referencesView supporting material

Primary source

Chi Cheuk Tsang, “Legendrian position of veering triangulations”, arXiv:2604.06690 (2026).

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