Torsion exceptional sheaves on weak del Pezzo surfaces of Type A
classification
🧮 math.AG
keywords
exceptionaltorsionpezzosheavesweakactinganticanonicalbundle
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We investigate torsion exceptional sheaves on a weak del Pezzo surface of degree greater than two whose anticanonical model has at most $A_n$-singularities. We show that every torsion exceptional sheaf can be obtained from a line bundle on a $(-1)$-curve by acting spherical twist functors successively.
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