Limits of trivial bundles on curves
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We extend the work of A. Beauville on rank $2$ vector bundles on a smooth curve in several directions. We give families of examples with large dimension, add new existence and non-existence results and prove the existence of indecomposable limits with arbitrary rank. To construct the large dimensional families we use the examples of limits of rank $2$ trivial bundles on $\mathbb {P}^2$ and $\mathbb {P}^3$ due to C. Banica. We also consider a more flexible notion: limits of trivial bundles on nearby curves.
Abstract
We extend the work of A. Beauville on rank $2$ vector bundles on a smooth curve in several directions. We give families of examples with large dimension, add new existence and non-existence results and prove the existence of indecomposable limits with arbitrary rank. To construct the large dimensional families we use the examples of limits of rank $2$ trivial bundles on $\mathbb {P}^2$ and $\mathbb {P}^3$ due to C. Banica. We also consider a more flexible notion: limits of trivial bundles on nearby curves.
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