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Proceedings of the Indian Academy of Sciences. Mathematical sciences
Article . 1999 . Peer-reviewed
License: Springer TDM
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Article . 1999
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Degenerations of the moduli spaces of vector bundles on curves II (generalized Gieseker moduli spaces)

Degenerations of the moduli spaces of vector bundles on curves. II. (Generalized Gieseker moduli spaces)
Authors: Nagaraj, D. S.; Seshadri, C. S.;

Degenerations of the moduli spaces of vector bundles on curves II (generalized Gieseker moduli spaces)

Abstract

For part I see \textit{D. S. Nagaraj} and \textit{C. S. Seshadri}, ibid. 107, No. 2, 101-137 (1997; Zbl 0922.14023). Let \(X_0\) be an irreducible projective curve of arithmetic genus \(g\geq 2\) whose singularity is one ordinary point. The authors give a generalisation of Gieseker's construction for arbitrary rank. They construct a birational model \(G(n,d)\) of the moduli space \(U(n,d)\) of stable torsion free sheaves in the case \((n,d)=1,\) such that \(G(n,d)\) has normal crossing singularities and behaves well under specialization, i.e. if a smooth projective curve specializes to \(X_0,\) then the moduli space of stable vector bundles of rank \(n\) and degree \(d\) on \(X\) specializes to \(G(n,d)\). This generalizes an earlier work of Gieseker in the rank two case. Theorem 1. There exists a canonical structure of a quasi-projective variety on \(G(n,d)\) and a canonical proper birational morphism \(\pi _{*}:G(n,d)\rightarrow U(n,d)_s\) onto the moduli space of stable torsion free sheaves on \(X_0.\) The singularities of \(G(n,d)\) are (analytic) normal crossings. If \((n,d)=1\), \(G(n,d)\) is projective, since \(U(n,d)_s=U(n,d)\) is projective.

Keywords

projective curves with singularities, Formal methods and deformations in algebraic geometry, Vector bundles on curves and their moduli, moduli space of stable vector bundles, Families, moduli of curves (algebraic), Singularities of curves, local rings

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
22
Top 10%
Top 10%
Average
gold