The Schober reconstruction conjecture from versal harmonic maps

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Let Σ\Sigma be a spectral cover of a Riemann surface XX, let ϕ\phi be the multivalued differential corresponding to Σ\Sigma, and let S\mathfrak{S} be the perverse Schober on XX associated with the conic bundle. For each θ∈R\theta\in\mathbb{R}, let hθh_\theta be a versal harmonic eiθϕe^{i\theta}\phi-map.

Schober reconstruction conjecture. The Schober S\mathfrak{S}, together with a stability structure on it, can be recovered from the family

{hθ}θ∈R\{h_\theta\}_{\theta\in\mathbb{R}}

of versal harmonic eiθϕe^{i\theta}\phi-maps.

This proposes a geometric reconstruction of categorical stability data from the family of harmonic maps. The source explicitly says that a general theory for buildings of arbitrary rank remains an open problem, and gives no resolution of this reconstruction claim.

References

Primary source

Ludmil Katzarkov, Alexander Noll, Pranav Pandit and Carlos Simpson, “Constructing Buildings and Harmonic Maps”, arXiv:1503.00989 (2015).

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