Author | Esnault, Hรฉlรจne. author |
---|---|

Title | Lectures on Vanishing Theorems [electronic resource] / by Hรฉlรจne Esnault, Eckart Viehweg |

Imprint | Basel : Birkhรคuser Basel : Imprint: Birkhรคuser, 1992 |

Connect to | http://dx.doi.org/10.1007/978-3-0348-8600-0 |

Descript | VIII, 166 p. online resource |

SUMMARY

Introduction M. Kodaira's vanishing theorem, saying that the inverse of an ample invertยญ 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 reยญ 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)

CONTENT

ยง 1 Kodairaโ{128}{153}s vanishing theorem, a general discussion -- ยง 2 Logarithmic de Rham complexes -- ยง 3 Integral parts of Q-divisors and coverings -- ยง 4 Vanishing theorems, the formal set-up -- ยง 5 Vanishing theorems for invertible sheaves -- ยง 6 Differential forms and higher direct images -- ยง 7 Some applications of vanishing theorems -- ยง 8 Characteristic p methods: Lifting of schemes -- ยง 9 The Frobenius and its liftings -- ยง 10 The proof of Deligne and Illusie [12] -- ยง 11 Vanishing theorems in characteristic p -- ยง 12 Deformation theory for cohomology groups -- ยง 13 Generic vanishing theorems [26], [14] -- Appendix: Hypercohomology and spectral sequences -- References

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