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We prove the Morrison--Kawamata cone conjecture for projective primitive symplectic varieties with $\Q$-factorial and terminal singularities with $b_2\geq 5$, from which we derive for instance the finiteness of minimal models of such…

Algebraic Geometry · Mathematics 2022-08-01 Christian Lehn , Giovanni Mongardi , Gianluca Pacienza

We give a proof of the Morrison-Kawamata cone conjecture for Enriques surfaces independent of their characteristic. It is based on the analysis of certain generically finite morphisms of degree two.

Algebraic Geometry · Mathematics 2026-04-09 Simon Brandhorst , Gebhard Martin , Tobias Schnieders

We develop the theory of Morrison-Kawamata dream spaces, which axiomatizes varieties (not necessarily of Calabi-Yau type) that satisfy the Morrison-Kawamata cone conjecture. Using this theory, we establish the generic deformation invariance…

Algebraic Geometry · Mathematics 2025-12-02 Sung Rak Choi , Xingying Li , Zhan Li , Chuyu Zhou

The aim of this survey paper is threefold: (a) to discuss the status of the Morrison-Kawamata cone conjecture, (b) to report on recent developments towards the Abundance Conjecture, and (c) to discuss the nef line bundle version of the…

Algebraic Geometry · Mathematics 2019-04-15 Vladimir Lazić , Keiji Oguiso , Thomas Peternell

We introduce a property of convex cones, being "well-clipped", that is inspired by the work of several complex algebraic geometers on the Morrison-Kawamata cone conjecture. That property is satisfied by movable cones of divisors on various…

Algebraic Geometry · Mathematics 2026-05-14 Cécile Gachet

We establish two consequences of the Kawamata--Morrison--Totaro cone conjecture, and prove them unconditionally in all dimensions. First, for a K-trivial variety, the natural action of its automorphism group on the set of ample divisor…

Algebraic Geometry · Mathematics 2026-05-01 Daniil Serebrennikov

A Generalized Hyperelliptic Variety (GHV) is the quotient of an abelian variety by a free action of a finite group which does not contain any translation. These varieties are natural generalizations of bi-elliptic surfaces. In this paper we…

Algebraic Geometry · Mathematics 2024-03-21 Martina Monti , Ana Quedo

We prove that if the Morrison cone conjecture holds for a smooth Calabi-Yau threefold $Y$, it holds for any smooth Calabi-Yau threefold deformation-equivalent to $Y$. We use this result to prove a new case of the Morrison cone conjecture.

Algebraic Geometry · Mathematics 2025-01-27 Wendelin Lutz

We relate the Morrison-Kawamata cone conjecture for Calabi-Yau fiber spaces to the existence of Shokurov polytopes. For K3 fibrations, the existence of (weak) fundamental domains for movable cones is established. The relationship between…

Algebraic Geometry · Mathematics 2025-11-05 Zhan Li , Hang Zhao

Assuming the Morrison-Kawamata cone conjecture for the generic fiber of a Calabi-Yau fibration and the abundance conjecture, we show (1) the finiteness of minimal models, (2) the existence of a weak rational polyhedral fundamental domain…

Algebraic Geometry · Mathematics 2023-09-12 Zhan Li

We prove the weak relative Kawamata-Morrison movable cone conjecture for K-trivial fibrations whose very general fibre is a quotient, by a finite group of automorphisms acting freely in codimension one, of a product of certain Calabi-Yau…

Algebraic Geometry · Mathematics 2026-03-25 Aurélien Faucher

We prove the Morrison-Kawamata cone conjecture for klt Calabi-Yau pairs in dimension 2. That is, for a large class of rational surfaces as well as K3 surfaces and abelian surfaces, the action of the automorphism group of the surface on the…

Algebraic Geometry · Mathematics 2019-12-19 Burt Totaro

In this paper we introduce the Fourier-Mukai transform for Lawson homology of abelian varieties and prove an inversion theorem for the Lawson homology as well as the morphic cohomology of abelian varieties. As applications, we obtain the…

Algebraic Geometry · Mathematics 2011-10-18 Wenchuan Hu

We review what is known about the Hodge conjecture for abelian varieties, with some emphasis on how Mumford-Tate groups have been applied to this problem.

alg-geom · Mathematics 2008-02-03 B. Brent Gordon

We give a reduction of Donovan's conjecture for abelian groups to a similar statement for quasisimple groups. Consequently we show that Donovan's conjecture holds for abelian $2$-groups.

Representation Theory · Mathematics 2018-03-12 Charles Eaton , Michael Livesey

For a Calabi-Yau manifold $X$, the Kawamata - Morrison movable cone conjecture connects the convex geometry of the movable cone $\overline{\mathrm{Mov}}(X)$ to the birational automorphism group. Using the theory of Coxeter groups, Cantat…

Algebraic Geometry · Mathematics 2024-03-04 José Ignacio Yáñez

Following a recent work of Oguiso, we calculate explicitly the groups of automorphisms and birational automorphisms on a Calabi-Yau manifold with Picard number two. When the group of birational automorphisms is infinite, we prove that the…

Algebraic Geometry · Mathematics 2019-04-15 Vladimir Lazić , Thomas Peternell

We give a counterexample of Morrison's cone conjecture for a strict Calabi-Yau threefold.

Algebraic Geometry · Mathematics 2022-11-21 Keiji Oguiso

The Morrison--Kawamata Cone Conjecture predicts that the action of the automorphism group on the effective nef cone and the action of the pseudo-automorphism group on the effective movable cone of a klt Calabi-Yau pair have rational,…

Algebraic Geometry · Mathematics 2015-07-31 Izzet Coskun , Artie Prendergast-Smith

We verify the Morrison--Kawamata conjecture for a certain class of rational threefolds, namely blowups of P^3 in the base locus of a net of quadrics with no reducible members. This seems to be the first verified case of the conjecture for…

Algebraic Geometry · Mathematics 2009-11-02 Artie Prendergast-Smith
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