NOTES ON TORIC VARIETIES FROM MORI THEORETIC VIEWPOINT, II
NOTES ON TORIC VARIETIES FROM MORI THEORETIC VIEWPOINT, II
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DOI：
10.1017/nmj.2018.27
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发表时间：
2001-12
影响因子：
0.8
通讯作者：
O. Fujino;H. Sato
中科院分区：
文献类型：
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作者：
O. Fujino;H. Sato
我们对复曲面品种的双有理型极值射线长度给出了新的估计。通过明确构建一些示例，我们可以看到我们的新估计是最好的。作为应用，我们讨论了射影复曲面簇的伴随丛的稀疏性和伪有效性。我们还对藤田的自由性和复曲面品种的丰富性进行了一些概括。
We give new estimates of lengths of extremal rays of birational type for toric varieties. We can see that our new estimates are the best by constructing some examples explicitly. As applications, we discuss the nefness and pseudo-effectivity of adjoint bundles of projective toric varieties. We also treat some generalizations of Fujita’s freeness and very ampleness for toric varieties.