On the Swan conductor in positive characteristic

On the Swan conductor in positive characteristic
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论天鹅指挥的积极特性

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发表时间:
1997
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通讯作者:
Shigeki Matsuda
Shigeki Matsuda
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文献类型:
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作者:
Shigeki Matsuda

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设X是正特征代数闭域上的真光滑曲面,U是单法交因子的补。对于U上的光滑l-adic层,Deligne利用局部不变量证明了一个计算U上l-adic层的Euler特征线的公式.加藤给出了另一个公式的欧拉特征的情况下,其中的rank 1,使用类场理论。在本文中,我们证明了这些公式的局部项是一致的,并对消失圈作了某些修正。
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.