Esnault / Vieweg Lectures on Vanishing Theorems

1992
ISBN: 978-3-0348-8600-0
Verlag: Springer
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, Band 20, 166 Seiten, eBook

Reihe: Oberwolfach Seminars

Introduction M. Kodaira's vanishing theorem, saying that the inverse of an ample invert ible sheaf on a projective complex manifold X has no cohomology below the dimension of X and its generalization, due to Y. Akizuki and S. Nakano, have been proven originally by methods from differential geometry ([39J and [1]). Even if, due to J.P. Serre's GAGA-theorems [56J and base change for field extensions the algebraic analogue was obtained for projective manifolds over a field k of characteristic p = 0, for a long time no algebraic proof was known and no generalization to p > 0, except for certain lower dimensional manifolds. Worse, counterexamples due to M. Raynaud [52J showed that in characteristic p > 0 some additional assumptions were needed. This was the state of the art until P. Deligne and 1. Illusie [12J proved the degeneration of the Hodge to de Rham spectral sequence for projective manifolds X defined over a field k of characteristic p > 0 and liftable to the second Witt vectors W2(k). Standard degeneration arguments allow to deduce the degeneration of the Hodge to de Rham spectral sequence in characteristic zero, as well, a re sult which again could only be obtained by analytic and differential geometric methods beforehand. As a corollary of their methods M. Raynaud (loc. cit.) gave an easy proof of Kodaira vanishing in all characteristics, provided that X lifts to W2(k).

Zielgruppe

Research

Autoren/Hrsg.

Esnault

Vieweg

Inhaltsverzeichnis

§ 1 Kodaira’s vanishing theorem, a general discussion.- § 2 Logarithmic de Rham complexes.- § 3 Integral parts of Q-divisors and coverings.- § 4 Vanishing theorems, the formal set-up.- § 5 Vanishing theorems for invertible sheaves.- § 6 Differential forms and higher direct images.- § 7 Some applications of vanishing theorems.- § 8 Characteristic p methods: Lifting of schemes.- § 9 The Frobenius and its liftings.- § 10 The proof of Deligne and Illusie [12].- § 11 Vanishing theorems in characteristic p.- § 12 Deformation theory for cohomology groups.- § 13 Generic vanishing theorems [26], [14].- Appendix: Hypercohomology and spectral sequences.- References.