On the homotopy exact sequence for Nori's fundamental group
Autor: | Esnault, Hélène, Hai, Phùng Hô, Viehweg, Eckart |
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Rok vydání: | 2009 |
Předmět: | |
Druh dokumentu: | Working Paper |
Popis: | Unlike Grothendieck's \'etale fundamental group, Nori's fundamental group does not fulfill the homotopy exact sequence in general. We give necessary and sufficient conditions which force exactness of the sequence. Comment: Lei Zhang found a gap in the proof of Proposition 3.4. We withdraw the article, at least for the time being |
Databáze: | arXiv |
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