Coates–Corti–Iritani–Tseng's quantum Lefschetz conjecture without convexity

Let GG be an abelian group acting in a CI-GIT presentation, and let Y//GY\mathord{/{\mkern-6mu/}}G be the corresponding quotient with projective coarse moduli space. Let i:Y//GX//G\mathfrak{i}:Y\mathord{/{\mkern-6mu/}}G\to X\mathord{/{\mkern-6mu/}}G be the embedding, let IX//G,EI^{X\mathord{/{\mkern-6mu/}}G,E} be the EE-twisted quasimap II-function, and let κ\kappa be the equivariant parameter for fiberwise scaling of EE. Coates–Corti–Iritani–Tseng's conjecture. If

limκ0iIX//G,E\lim_{\kappa\to 0}\mathfrak{i}^*I^{X\mathord{/{\mkern-6mu/}}G,E}

exists, then

limκ0iIX//G,E\lim_{\kappa\to 0}\mathfrak{i}^*I^{X\mathord{/{\mkern-6mu/}}G,E}

is on the Lagrangian cone of Y//GY\mathord{/{\mkern-6mu/}}G. The paper explains that this conjecture is faulty: the nonequivariant limit must exist before restriction to Y//GY\mathord{/{\mkern-6mu/}}G, so the stated claim is refuted by the correction developed in the paper.

Sources & referencesView supporting material

Primary source

Nawaz Sultani and Rachel Webb, “Subtleties of Quantum Lefshetz without Convexity”, arXiv:2208.08987 (2022).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.