On the Swan conductor in positive characteristic
On the Swan conductor in positive characteristic
复制标题
论天鹅指挥的积极特性
DOI:
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
Shigeki Matsuda
中科院分区:
文献类型:
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作者:
Shigeki Matsuda
Let X be a proper smooth surface over an algebraically closed field of positive characteristic and U be a complement of a simple normal crossing divisor. For a smooth l -adic sheaf Ƒ on U , Deligne proved a formula calculating the Euler characteristic of Ƒ by local invariants. Kato gave another formula for the Euler characteristic in case where Ƒ is of rank 1, using class field theory. In this paper, we show that local terms of these formulas coincide, admitting certain conjectures for vanishing cycles.