Tilting-object conjecture for canonical bundles over reflexive polytopes

Let PP be a reflexive polytope. Let Σ\Sigma be a simplicial fan whose ray primitive generators are the vertices of PP, and let V\mathcal{V} be the fan of the canonical bundle over XΣX_\Sigma. Reflexive-polytope tilting conjecture. If the toric Deligne–Mumford stack XΣ\mathcal{X}_\Sigma has a tilting object T\mathcal{T}, then XV\mathcal{X}_\mathcal{V} also has a tilting object. Consequently, if XΣ\mathcal{X}_\Sigma has a tilting object, then

R=k[Cone(P×{1})M]R=k[|\operatorname{Cone}(P\times\{1\})|^\vee\cap M]

has an NCCR. The conjecture is motivated by expected cohomology vanishing for toric Fanos; the source gives no resolution.

Sources & referencesView supporting material

Primary source

Aimeric Malter and Artan Sheshmani, “Towards non-commutative crepant resolutions of affine toric Gorenstein varieties”, arXiv:2509.11664 (2025).

Additional references

2 papers in this index state this conjecture (2005–2025). The statement above is taken from the most recent of them; the others are arXiv:math/0506018.

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