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arXiv 1202.1897math.AG
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$\PP^1$上稳定对位$\SO_n$、$\Sp_n$和$\Spin$丛存在的判据

Criteria for existence of stable parahoric $\SO_n$, $\Sp_n$ and $\Spin$ bundles on $\PP^1$

Yashonidhi Pandey

摘要:

设$p: Y \ra X$是$\CC$上光滑射影曲线的Galois覆盖,其Galois群为$Γ$ .研究了$Γ$对$Y$的作用提升到的$Y$上的主正交辛丛$E$.我们特别是描述它们内在的$X$定义的对象,并呼吁这些对象parahoric束。本文给出了射影线$\PP^1$上稳定(和半稳定)的特殊正交、辛和自旋丛的模非空的充要条件。

英文摘要:

Let $p: Y \ra X$ be a Galois cover of smooth projective curves over $\CC$ with Galois group $Γ$. This paper is devoted to the study of principal orthogonal and symplectic bundles $E$ on $Y$ to which the action of $Γ$ on $Y$ lifts. We notably describe them intrinsically in terms of objects defined on $X$ and call these objects parahoric bundles. We give necessary and sufficient conditions for the non-emptiness of the moduli of stable (and semi-stable) parahoric special orthogonal, symplectic and spin bundles on the projective line $\PP^1$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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