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arXiv math/0604617math.AGhep-thmath.RT
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Hitchin系统的Langlands对偶

Langlands duality for Hitchin systems

Ron Donagi, Tony Pantev

摘要:

我们证明了简单复李群$G$的Hitchin可积系统与Langlands对偶群$\lan{G}$的Hitchin系统是对偶的.特别地,用于$G$的Hitchin系统的连通分量$\Higgs_0$的一般纤维是阿贝尔簇,其与用于$\lan{G}$的Hitchin系统的连通分量的相应纤维是对偶的。非中性连通分支$\Higgs_α$在$\Higgs_0$上形成torsor。我们证明了它们在$\Higgs_0$上的自旋是由$G$束$\gHiggs$的自旋诱导的.更一般地,我们建立了$G$ -Higgs束的gerbe $\gHiggs$和$\lan{G}$ -Higgs束的gerbe $\lan{\gHiggs}$之间的对偶,它包含了所有以前的对偶。这些结果直接推广到任意连通复还原群$\mathbb{G}$ .

英文摘要:

We show that the Hitchin integrable system for a simple complex Lie group $G$ is dual to the Hitchin system for the Langlands dual group $\lan{G}$. In particular, the general fiber of the connected component $\Higgs_0$ of the Hitchin system for $G$ is an abelian variety which is dual to the corresponding fiber of the connected component of the Hitchin system for $\lan{G}$. The non-neutral connected components $\Higgs_α$ form torsors over $\Higgs_0$. We show that their duals are gerbes over $\Higgs_0$ which are induced by the gerbe of $G$-Higgs bundles $\gHiggs$. More generally, we establish a duality between the gerbe $\gHiggs$ of $G$-Higgs bundles and the gerbe $\lan{\gHiggs}$ of $\lan{G}$-Higgs bundles, which incorporates all the previous dualities. All these results extend immediately to an arbirtary connected complex reductive group $\mathbb{G}$.

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