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arXiv 1209.0022math.RT
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秩为3的Lorentzian Kac-Moody代数的根系(arXiv版)

Root systems for Lorentzian Kac-Moody algebras in rank 3 (arXiv version)

Daniel Allcock

摘要:

有时一个双曲Kac-Moody代数允许一个自守修正,这意味着一个广义Kac-Moody代数具有相同的实单根,并且其分母函数具有良好的自守性质;例如,这些允许计算根的重数。格里森科和尼库林在他们的洛伦兹李代数理论中将其形式化,并证明了实单根必须满足某些条件,以便代数允许自守修正。我们对满足条件的秩为3的双曲根系进行了分类,并证明了它们只有有限多个单根,或等价地只有一个类时Weyl向量。有994个,多达24个单根。数据中的模式表明,一些不明显的案例可能是最富有的。

英文摘要:

Sometimes a hyperbolic Kac-Moody algebra admits an automorphic correction, meaning a generalized Kac-Moody algebra with the same real simple roots and whose denominator function has good automorphic properties; these for example allow one to work out the root multiplicities. Gritsenko and Nikulin have formalized this in their theory of Lorentzian Lie algebras and shown that the real simple roots must satisfy certain conditions in order for the algebra to admit an automorphic correction. We classify the hyperbolic root systems of rank 3 that satisfy their conditions and have only finite many simple roots, or equivalently a timelike Weyl vector. There are 994 of them, with as many as 24 simple roots. Patterns in the data suggest that some of the non-obvious cases may be the richest.

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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