Morrison–Totaro cone conjecture for klt log Calabi–Yau pairs

Let (X,Δ)(X,\Delta) be a klt log Calabi–Yau pair, meaning that XX is smooth projective and ΔKX\Delta \in |-K_X| is linearly equivalent to iaiDi\sum_i a_iD_i for effective divisors DiD_i and constants 0ai<10 \leq a_i<1; the case Δ=\Delta=\emptyset is allowed. Write Aut(X,Δ)\operatorname{Aut}(X,\Delta) for automorphisms preserving Δ\Delta, PsAut(X,Δ)\operatorname{PsAut}(X,\Delta) for pseudo-automorphisms preserving Δ\Delta, and let Nef+(X)\mathrm{Nef}^+(X) and Mov+(X)\overline{\mathrm{Mov}}^+(X) denote the rational hulls of the nef and closed movable cones. Morrison–Totaro cone conjecture. Both of the following actions admit rational polyhedral fundamental domains: the action of Aut(X,Δ)\operatorname{Aut}(X,\Delta) on Nef+(X)\mathrm{Nef}^+(X), and the action of PsAut(X,Δ)\operatorname{PsAut}(X,\Delta) on Mov+(X)\overline{\mathrm{Mov}}^+(X). Totaro generalized the Morrison cone conjecture from Calabi–Yau varieties to klt log Calabi–Yau pairs. The source does not specify a resolution status.

Sources & referencesView supporting material

Primary source

Wendelin Lutz, “The Morrison Cone Conjecture under Deformation”, arXiv:2410.05949 (2025).

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