ON THE IRREDUCIBLE COMPONENTS OF CHARACTERISTIC VARIETIES
ON THE IRREDUCIBLE COMPONENTS OF CHARACTERISTIC VARIETIES
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论特征品种的不可约成分
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
A. Dimca
中科院分区:
文献类型:
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作者:
A. Dimca
This is a quick survey on the characteristic varieties associated to rank one local systems on a smooth, irreducible, quasi-projective complex variety M. A key new result is Proposition 1.8, giving additional information on the constructible sheaf F = R 0 f∗(L), where L is a rank one local system on M and f : M → S is a surjective morphism with S a smooth curve and the generic fiber F of f connected. Corollary 1.9 says that for S compact, the singular support of F cannot be a singleton.