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arXiv · alg-geom/9707004

Principal G-bundles over elliptic curves

Robert Friedman·John W. Morgan·Edward Witten
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Abstract

Let $G$ be a simple and simply connected complex Lie group. We discuss the moduli space of holomorphic semistable principal $G$ bundles over an elliptic curve $E$. In particular we give a new proof of a theorem of Looijenga and Bernshtein-Shvartsman, that the moduli space is a weighted projective space. The method of proof is to study the deformations of certain unstable bundles coming from special maximal parabolic subgroups of $G$. We also discuss the associated automorphism sheaves and universal bundles, as well as the relation between various universal bundles and spectral covers.

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Robert Friedman, John W. Morgan, Edward Witten. 1998-02-23. Principal G-bundles over elliptic curves. https://arxiv.org/abs/alg-geom/9707004

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