Ciocan-Fontanine–Kim–Sabbah conjecture for quantum abelianisation
Ciocan-Fontanine–Kim–Sabbah conjecture for quantum abelianisation
Consider a GIT quotient and its abelianisation . Fix lifts of cohomology classes from to , coordinates in a basis of , lifted coordinates , and the natural specialization map from the quantum parameters of to those of . Let denote the quantum product on , and let denote the quantum product on after specialization via . For classes , let be the unique classes satisfying
Ciocan-Fontanine–Kim–Sabbah conjecture. For as above,
where is an appropriate change of variables. This conjecture relates the quantum cohomology of a GIT quotient to the specialized quantum cohomology of its abelianisation; the source restricts the general big-quantum-cohomology conjecture to small quantum cohomology, and does not state its resolution.
Sources & referencesView supporting material
Primary source
Wei Gu and Elana Kalashnikov, “A rim-hook rule for quiver flag varieties”, arXiv:2009.02810 (2020).
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