On the existence of a crepant resolution of some moduli spaces of sheaves on an abelian surface |
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Authors: | Jaeyoo Choy Young-Hoon Kiem |
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Affiliation: | (1) Department of Mathematics, Seoul National University, Seoul, 151-747, Korea |
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Abstract: | Let J be an abelian surface with a generic ample line bundle . For n≥1, the moduli space MJ(2,0,2n) of (1)-semistable sheaves F of rank 2 with Chern classes c1(F)=0, c2(F)=2n is a singular projective variety, endowed with a holomorphic symplectic structure on the smooth locus. In this paper, we show that there does not exist a crepant resolution of MJ(2,0,2n) for n≥2. This certainly implies that there is no symplectic desingularization of MJ(2,0,2n) for n≥2. Jaeyoo Choy was partially supported by KRF 2003-070-C00001 Young-Hoon Kiem was partially supported by a KOSEF grant R01-2003-000-11634-0. |
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