Remarks on nef and movable cones of hypersurfaces in Mori dream spaces
Remarks on nef and movable cones of hypersurfaces in Mori dream spaces
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森梦空间中的nef和超曲面可动锥评述
DOI:
10.1016/j.jpaa.2022.107101
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发表时间:
2022
影响因子:
0.8
通讯作者:
Wang Long
中科院分区:
文献类型:
--
作者:
安部清尚;他 KamLAND コラボレーション;Zhou Yiwen;Wang Long
We investigate nef and movable cones of hypersurfaces in Mori dream spaces. The first result is: Let Z be a smooth Mori dream space of dimension at least four whose extremal contractions are of fiber type of relative dimension at least two and let X be a smooth ample divisor in Z, then X is a Mori dream space as well. The second result is: Let Z be a Fano manifold of dimension at least four whose extremal contractions are of fiber type and let X be a smooth anti-canonical hypersurface in Z, which is a smooth Calabi–Yau variety, then the unique minimal model of X up to isomorphism is X itself, and moreover, the movable cone conjecture holds for X, namely, there exists a rational polyhedral cone which is a fundamental domain for the action of birational automorphisms on the effective movable cone of X. The third result is: Let P:= P n×⋯× P n be the N-fold self-product of the n-dimensional projective space. Let X be a general complete intersection of n+ 1 hypersurfaces of multidegree (1,…, 1) in P with dim X≥ 3. Then X has only finitely many minimal models up to isomorphism, and moreover, the movable cone conjecture holds for X.
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期刊:
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