The paper re-proves Narasimhan-Ramanan's identification of SU_X(2) with P^3 by showing the anticanonical Seshadri constant is 4, but the proof has a gap in the Quot-scheme construction.
Seshadri constants of abelian varieties
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A remark on a theorem of Narasimhan and Ramanan
The paper re-proves Narasimhan-Ramanan's identification of SU_X(2) with P^3 by showing the anticanonical Seshadri constant is 4, but the proof has a gap in the Quot-scheme construction.