The subbundles of decomposable vector bundles over an elliptic curve
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Let $C$ be an elliptic curve and $E, F$ polystable vector bundles on $C$ such that no two among the indecomposable factors of $E\oplus F$ are isomorphic. Here we give a complete classification of such pairs $(E,F)$ such that $E$ is a subbundle of $F$.
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Ballico, E. (Edoardo) , 1955-. “The subbundles of decomposable vector bundles over an elliptic curve”. Collectanea Mathematica, vol.VOL 49, no. 2, pp. 185-9, https://raco.cat/index.php/CollectaneaMathematica/article/view/56450.
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