An ampleness criterion for rank 2 vector bundles on surfaces
Abstract
We observe that the proof of the Bogomolov stable restriction theorem can be adapted to give an ampleness criterion for globally generated rank 2 vector bundles on certain surfaces. This applies to the Lazarsfeld-Mukai bundles, to congruences of lines in P3, and possibly to the construction of surfaces with ample cotangent bundle (help welcome!).
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