Answers are grounded in this paper and cite their sources.
Inspired by the quadratic involutions of Corti-Pukhlikov-Reid and Gavin Brown's description of hypersurface flips via toric GIT, we apply similar symmetries to local covering models of terminal threefold flops. We recover the derived equivalence of their canonical stacks by pullback and pushforward along the fibre product over the canonical stack of the contraction target, revisiting the local picture in Kawamata's work.
No takes yet. Share an insight, caveat, or question.
Xingbang Hao (2026) studied this question.
Synapse has enriched 8 closely related papers on similar clinical questions. Consider them for comparative context: