The unconditional weak Landau–Ginzburg model formula for cyclic covers

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Let YY be a smooth Fano variety of index rr, let DYD\subseteq Y be a smooth anti-canonical divisor, and let XX be the corresponding cyclic cover. A graded exact Lagrangian torus in Y\DY\backslash D is the hypothesis used in the preceding construction. Unconditional cyclic-cover formula. The weak Landau–Ginzburg model formula for cyclic covers holds without assuming that Y\DY\backslash D contains a graded exact Lagrangian torus. This would make the cyclic-cover construction purely algebro-geometric rather than dependent on the existence of such a Lagrangian torus; the source does not state whether the claim has been resolved.

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Primary source

Mohamed El Alami, “An open GW-formula for Lagrangians in Fano varieties”, arXiv:2305.02102 (2023).

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