Extensions and rank-2 vector bundles on irreducible nodal curves
D. Arcara
math.AGarXiv:math/0403325
Abstract
We generalize Bertram's work on rank two vector bundles to an irreducible projective nodal curve C. We use extensions of a line bundle L by OC and the associated `forgetful' map to study a compactification of the moduli space of semi-stable vector bundles of rank 2 and determinant L on C.
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