Injectivity conjecture for primitive quantum algebras of Fano hypersurfaces
Let be the natural inclusion of a smooth Fano hypersurface in a Fano manifold of Picard number , with . Let and be the respective indices, let and denote the hyperplane classes, and let and be the corresponding primitive algebras. Write and for the associated operators.
Injectivity conjecture. With the same notation as in the quantum Lefschetz proposition, there is a natural injective morphism of algebras
that intertwines the operators and .
This predicts that the primitive quantum algebra of a smooth Fano hypersurface contains the corresponding primitive algebra of its ambient manifold in a way compatible with the index-power hyperplane operators. The supplied text gives no resolution status for this assertion.
References
Primary source
Pieter Belmans, Sergey Galkin, Naichung Conan Leung, Changzheng Li, Markus Reineke and Rui Xiong, “A-D-E diagrams, Hodge–Tate hyperplane sections and semisimple quantum cohomology”, arXiv:2509.01101 (2025).
Additional references
17 papers in this index state this conjecture (2005–2025). The statement above is taken from the most recent of them; the others are arXiv:2508.01040, arXiv:2409.18019, arXiv:2407.03248, arXiv:2401.09995, arXiv:2302.14194, arXiv:2209.11109, arXiv:1803.04095, arXiv:1308.1718, arXiv:1203.3637, arXiv:1202.2482, arXiv:1112.3708, arXiv:1101.3480, and 4 more.
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