Canonical lamination realization conjecture for the stretch unit sphere

Let Σg\Sigma_g be a closed surface of genus gg, let σTg\sigma\in\mathscr T_g be a hyperbolic structure, and let vv be a vector in the stretch unit sphere of TσTgT_\sigma\mathscr T_g. Denote by vv^* the lamination associated with vv. Canonical lamination realization conjecture. For every vector vv in the stretch unit sphere of TσTgT_\sigma\mathscr T_g there exists a hyperbolic structure τTg\tau\in\mathscr T_g such that vv^* is the canonical lamination maximally stretched by the homotopy class of the identity (Σg,σ)(Σg,τ)(\Sigma_g,\sigma)\to(\Sigma_g,\tau). The conjecture proposes that every direction in the stretch unit sphere arises as the canonical maximally stretched lamination of an identity map to some hyperbolic structure; the supplied text gives no resolution or further evidence.

Sources & referencesView supporting material

Primary source

Aidan Backus, “The canonical lamination calibrated by a cohomology class”, arXiv:2412.00255 (2026).

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