Smooth 4-folds which contain a P1-bundle¶as an ample divisor
Smooth 4-folds which contain a P1-bundle¶as an ample divisor
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包含 P1 束的平滑 4 倍¶作为充足的除数
DOI:
10.1007/s002290050218
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发表时间:
2000
影响因子:
0.6
通讯作者:
Zhao Yicai
中科院分区:
文献类型:
--
作者:
E. Sato;Zhao Yicai
We show that if a smooth projective 4-foldMcontains an ample divisorAwhich isP1-bundle π :A→Sover a smooth projective surfaceS, π is extended to aP2-bundle π :S→S, unlessis isomorphic toP2×P1.