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arXiv 0904.0912math.AG
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一级例外群的Verlinde空间的奇异对偶性

Strange duality for Verlinde spaces of exceptional groups at level one

Arzu Boysal, Christian Pauly

摘要:

光滑射影曲线X上主E_8-丛的模叠加M_X(E_8)带有一个自然因子Delta。研究了除子Delta到模栈M_X(P)的拉回,其中P是一个半单连通群,使得它的李代数Lie(P)是Lie(E_8)的极大共形子代数.我们证明了除子Delta在下列群对(SL(5),SL(5)),(Spin(8),Spin(8)),(SL(3),E_6)和(SL(2),E_7)的第一水平上的Verlinde空间之间诱导“奇异对偶”型同构.

英文摘要:

The moduli stack M_X(E_8) of principal E_8-bundles over a smooth projective curve X carries a natural divisor Delta. We study the pull-back of the divisor Delta to the moduli stack M_X(P), where P is a semi-simple and simply connected group such that its Lie algebra Lie(P) is a maximal conformal subalgebra of Lie(E_8). We show that the divisor Delta induces "Strange Duality"-type isomorphisms between the Verlinde spaces at level one of the following pairs of groups (SL(5), SL(5)), (Spin(8), Spin(8)), (SL(3), E_6) and (SL(2), E_7).

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