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A functorial property of nested Witt vectors

โœ Scribed by Roland Auer


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
75 KB
Volume
252
Category
Article
ISSN
0021-8693

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โœฆ Synopsis


For coprime truncation sets M, N โŠ‚ N, we establish an isomorphism of functors W N โ€ข


๐Ÿ“œ SIMILAR VOLUMES


Vanishing via Lifting to Second Witt Vec
โœ Mark Andrea A. de Cataldo ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 97 KB

A proof based on reduction to finite fields of Esnault and Viehweg's stronger version of the Sommese vanishing theorem for k-ample line bundles is given. This result is used to give different proofs of isotriviality results of Parshin and Migliorini.