On contractible curves on normal surfaces
On contractible curves on normal surfaces
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关于法向曲面上的可收缩曲线
DOI:
10.1515/crll.2000.057
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
S. Schroeer
中科院分区:
文献类型:
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作者:
S. Schroeer
We give characterizations of contractible curves on proper normal algebraic surfaces in terms of complementary Weil divisors. From this we obtain some generalizations of the classical criteria for contractibility of Castelnuovo and Artin. Furthermore, we will derive a finiteness result on homogeneous spectra defined by Weil divisors on proper normal algebraic surfaces.