Stable pairs, linear systems and the Verlinde formula
Stable pairs, linear systems and the Verlinde formula
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稳定对、线性系统和 Verlinde 公式
DOI:
10.1007/bf01232244
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发表时间:
1992
影响因子:
3.1
通讯作者:
M. Thaddeus
中科院分区:
文献类型:
--
作者:
M. Thaddeus
We study the moduli problem of pairs consisting of a rank 2 vector bundle and a nonzero section over a fixed smooth curve. The stability condition involves a parameter; as it varies, we show that the moduli space undergoes a sequence of flips in the sense of Mori. As applications, we prove several results about moduli spaces of rank 2 bundles, including the Harder-Narasimhan formula and the SU(2) Verlinde formula. Indeed, we prove a general result on the space of sections of powers of the ideal sheaf of a curve in projective space, which includes the Verlinde formula.