On the moduli b-divisors of lc-trivial fibrations
[Sur les b-diviseurs de modules des fibrations lc-triviales]
Fujino, Osamu ; Gongyo, Yoshinori
Annales de l'Institut Fourier, Tome 64 (2014), p. 1721-1735 / Harvested from Numdam
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Grosso modo, en utilisant le programme des modèles minimaux semi-stables, nous montrons que la partie modulaire d’une fibration lc-triviale coïncide avec celle d’une fibration klt-triviale induite par adjonction aprés changement de base par un morphisme génériquement fini. Comme application, eu utilisant le résultat de Ambro sur fibrations klt-triviales, on obtient que la partie modulaire d’une fibration lc-triviale est b-nef et abondante.

Roughly speaking, by using the semi-stable minimal model program, we prove that the moduli part of an lc-trivial fibration coincides with that of a klt-trivial fibration induced by adjunction after taking a suitable generically finite cover. As an application, we obtain that the moduli part of an lc-trivial fibration is b-nef and abundant by Ambro’s result on klt-trivial fibrations.

Publié le : 2014-01-01
DOI : https://doi.org/10.5802/aif.2894
Classification:  14N30,  14E30,  14J10
Mots clés: programme des modèles minimaux semi-stables, formules de fibré canoniques, fibrations lc-triviales, fibrations klt-triviales 
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     title = {On the moduli b-divisors of lc-trivial fibrations},
     journal = {Annales de l'Institut Fourier},
     volume = {64},
     year = {2014},
     pages = {1721-1735},
     doi = {10.5802/aif.2894},
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     language = {en},
     url = {http://dml.mathdoc.fr/item/AIF_2014__64_4_1721_0}
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Fujino, Osamu; Gongyo, Yoshinori. On the moduli b-divisors of lc-trivial fibrations. Annales de l'Institut Fourier, Tome 64 (2014) pp. 1721-1735. doi : 10.5802/aif.2894. http://gdmltest.u-ga.fr/item/AIF_2014__64_4_1721_0/

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