Strange duality for height zero moduli spaces of sheaves on P2
Strange duality for height zero moduli spaces of sheaves on P2
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DOI:
10.1307/mmj/1441116659
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发表时间:
2015-09
影响因子:
0.9
通讯作者:
T. Abe
中科院分区:
文献类型:
--
作者:
T. Abe
For a positive integer r and rational numbers s, d , we denote by M(r, s, d) the moduli space of rank r semistable sheaves E on P2 with μ(E) = s and (E) = d . We recall the definition of a strange duality map. Fix positive integers r , r ′ and rational numbers s, s′, d , d ′ such that χ(E ⊗ E′) = 0 for E ∈ M := M(r, s, d) and E′ ∈ M ′ := M(r ′, s′, d ′). Assume that s + s′ ≥ 0 (so that we have H2(E ⊗ E′) = 0). Consider the locus := {(E,E′) | H0(E ⊗ E′) = 0} ⊂ M × M ′.