The theta divisor of $SU_C(2,2d)^s$ is very ample if $C$ is not hyperelliptic

The theta divisor of $SU_C(2,2d)^s$ is very ample if $C$ is not hyperelliptic
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如果 $C$ 不是超椭圆形,则 $SU_C(2,2d)^s$ 的 theta 除数非常充足

DOI:
10.1215/s0012-7094-96-08222-8
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发表时间:
1994
影响因子:
2.5
通讯作者:
A. Verra
A. Verra
中科院分区:
数学1区
文献类型:
--
作者:
S. Brivio;A. Verra

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设$X$为属$g \ge 2$的光滑曲线C上的2阶半稳定向量束的模空间,$\theta : X \to PH^0(L)^*$为X上广义因子L的映射。我们证明了对于非超椭圆的C,映射$\theta$是内射的,$\theta$的微分在X的光滑点上是内射的。
Let $X$ be the moduli space of semistable rank 2 vector bundles over a smooth curve C of genus $g \ge 2$ and $\theta : X \to PH^0(L)^*$ be the map associated to the generalized theta divisor L on X. We prove that for C not hyperelliptic, the map $\theta$ is injective and the differential of $\theta$ is injective at smooth points of X.