Étale covers of affine spaces in positive characteristic
✍ Scribed by Kiran S Kedlaya
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 74 KB
- Volume
- 335
- Category
- Article
- ISSN
- 1631-073X
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✦ Synopsis
We prove that every projective, geometrically reduced scheme of dimension n over an infinite field k of positive characteristic admits a finite morphism over some finite radicial extension k of k to projective n-space, étale away from the hyperplane H at infinity, which maps a chosen Weil divisor into H and a chosen smooth geometric point of X not on the divisor to some point not in H . To cite this article: K.S. Kedlaya, C. R. Acad. Sci. Paris, Ser. I 335 (2002) 921-926. 2002 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS
Revêtements étales des espaces affines en caractéristique positive
Résumé
Nous prouvons que tout schéma projectif, géométriquement réduit de dimension n sur un corps infini k de caractéristique positive admet un morphisme fini aprés extension finie radicielle k de k, vers l'espace projectif de dimension n, étale sauf sur l'hyperplan H a l'infini, qui envoie dans H un diviseur de Weil choisi et un point géométrique lisse choisi de X en-dehors du diviseur sur un point en-dehors de H .
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