Relative and absolute Lefschetz standard conjectures for some Lagrangian fibrations
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914204669181952 |
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| author | Ancona, Giuseppe Cavicchi, Mattia Laterveer, Robert Saccà, Giulia |
| author_facet | Ancona, Giuseppe Cavicchi, Mattia Laterveer, Robert Saccà, Giulia |
| contents | We show that the hyper-Kähler varieties of OG10-type constructed by Laza-Saccà-Voisin (LSV) verify the Lefschetz standard conjecture. This is an application of a more general result, stating that certain Lagrangian fibrations verify this conjecture. The main technical assumption of this general result is that the Lagrangian fibration satisfies the hypotheses of Ngô's support theorem. Verifying that the LSV tenfolds do satisfy those hypotheses is of independent interest. Another point of independent interest of the paper is the definition and the study of the Lefschetz standard conjecture in the relative setting, and its relation to the classical absolute case. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2304_00978 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Relative and absolute Lefschetz standard conjectures for some Lagrangian fibrations Ancona, Giuseppe Cavicchi, Mattia Laterveer, Robert Saccà, Giulia Algebraic Geometry 14C25, 14J42 We show that the hyper-Kähler varieties of OG10-type constructed by Laza-Saccà-Voisin (LSV) verify the Lefschetz standard conjecture. This is an application of a more general result, stating that certain Lagrangian fibrations verify this conjecture. The main technical assumption of this general result is that the Lagrangian fibration satisfies the hypotheses of Ngô's support theorem. Verifying that the LSV tenfolds do satisfy those hypotheses is of independent interest. Another point of independent interest of the paper is the definition and the study of the Lefschetz standard conjecture in the relative setting, and its relation to the classical absolute case. |
| title | Relative and absolute Lefschetz standard conjectures for some Lagrangian fibrations |
| topic | Algebraic Geometry 14C25, 14J42 |
| url | https://arxiv.org/abs/2304.00978 |