We study numerical restricted volumes of classes on compact Kähler manifolds, as introduced by Boucksom. Inspired by work of Ein–Lazarsfeld–Mustaţă–Nakamaye–Popa on restricted volumes of line bundles on projective manifolds, we pose a natural conjecture to the effect that irreducible components of the non-Kähler locus of a big class should have vanishing numerical restricted volume. We prove this conjecture when the class has a Zariski decomposition, and give several applications.
Nous étudions les volumes restreints numériques de classes sur des variétés kähleriennes compactes, introduits par Boucksom. Inspirés par les travaux de Ein–Lazarsfeld–Mustaţă–Nakamaye–Popa sur les volumes restreints de fibrés en droites sur des variétés projectives, nous proposons la conjecture naturelle que les composantes irréductibles du lieu non-kählerien d’une classe grosse ont un volume restreint numérique identiquement nul. Nous établissons cette conjecture sous l’hypothèse que la classe admet une décomposition de Zariski, puis donnons plusieurs applications.
Tristan C. Collins 1; Valentino Tosatti 2
@article{AFST_2022_6_31_3_907_0, author = {Tristan C. Collins and Valentino Tosatti}, title = {Restricted volumes on {K\"ahler} manifolds}, journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques}, pages = {907--947}, publisher = {Universit\'e Paul Sabatier, Toulouse}, volume = {Ser. 6, 31}, number = {3}, year = {2022}, doi = {10.5802/afst.1708}, language = {en}, url = {https://afst.centre-mersenne.org/articles/10.5802/afst.1708/} }
TY - JOUR AU - Tristan C. Collins AU - Valentino Tosatti TI - Restricted volumes on Kähler manifolds JO - Annales de la Faculté des sciences de Toulouse : Mathématiques PY - 2022 SP - 907 EP - 947 VL - 31 IS - 3 PB - Université Paul Sabatier, Toulouse UR - https://afst.centre-mersenne.org/articles/10.5802/afst.1708/ DO - 10.5802/afst.1708 LA - en ID - AFST_2022_6_31_3_907_0 ER -
%0 Journal Article %A Tristan C. Collins %A Valentino Tosatti %T Restricted volumes on Kähler manifolds %J Annales de la Faculté des sciences de Toulouse : Mathématiques %D 2022 %P 907-947 %V 31 %N 3 %I Université Paul Sabatier, Toulouse %U https://afst.centre-mersenne.org/articles/10.5802/afst.1708/ %R 10.5802/afst.1708 %G en %F AFST_2022_6_31_3_907_0
Tristan C. Collins; Valentino Tosatti. Restricted volumes on Kähler manifolds. Annales de la Faculté des sciences de Toulouse : Mathématiques, Serie 6, Volume 31 (2022) no. 3, pp. 907-947. doi : 10.5802/afst.1708. https://afst.centre-mersenne.org/articles/10.5802/afst.1708/
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