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Vector bundles on Hirzebruch surfaces whose twists by a non-ample line bundle have natural cohomology

2007/10/18 by Edoardo Ballico, Ballico, E., Francesco Malaspina +1
Mathematics · #14J60 #Advanced Algebra and Geometry #Algebraic Geometry (math.AG) #Algebraic Geometry and Number Theory #FOS: Mathematics #Homotopy and Cohomology in Algebraic Topology

paper · pdf · doi:10.48550/arxiv.0710.3494

openalex publication_date 2007/10/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Here we study vector bundles E on the Hirzebruch surface Fe such that their twists by a spanned, but not ample, line bundle M = \mathcal OFe(h+ef) have natural cohomology, i.e. h0(Fe,E(tM)) >0 implies h1(Fe,E(tM)) = 0.

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