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Grothendieck–Ogg–Shafarevich formula : ウィキペディア英語版 | Grothendieck–Ogg–Shafarevich formula
In mathematics, the Grothendieck–Ogg–Shafarevich formula describes the Euler characteristic of complete curve with coefficients in an abelian variety or constructible sheaf, in terms of local data involving the Swan conductor. and proved the formula for abelian varieties with tame ramification over curves, and extended the formula to constructible sheaves over a curve . ==Statement==
Suppose that ''F'' is a constructible sheaf over a genus ''g'' smooth projective curve ''C'', of rank ''n'' outside a finite set ''X'' of points where it has stalk 0. Then : where ''Sw'' is the Swan conductor at a point.
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