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A NOTE ON RANK TWO STABLE BUNDLES OVER SURFACES
Published online by Cambridge University Press: 28 June 2021
Abstract.
Let π : X → C be a fibration with integral fibers over a curve C and consider a polarization H on the surface X. Let E be a stable vector bundle of rank 2 on C. We prove that the pullback π*(E) is a H-stable bundle over X. This result allows us to relate the corresponding moduli spaces of stable bundles $${{\mathcal M}_C}(2,d)$$ and $${{\mathcal M}_{X,H}}(2,df,0)$$ through an injective morphism. We study the induced morphism at the level of Brill–Noether loci to construct examples of Brill–Noether loci on fibered surfaces. Results concerning the emptiness of Brill–Noether loci follow as a consequence of a generalization of Clifford’s Theorem for rank two bundles on surfaces.
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- Research Article
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- © The Author(s), 2021. Published by Cambridge University Press on behalf of Glasgow Mathematical Journal Trust
Footnotes
The second author acknowledges the financial support of Programa para el Desarrollo Profesional Docente, para el Tipo Superior (PRODEP), clave UMSNH-CA-165.
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