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arXiv math-ph/0212047math-phmath.MP
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例外李代数统一张量演算的发展

Development of a unified tensor calculus for the exceptional Lie algebras

A. J. Macfarlane, Hendryk Pfeiffer

摘要:

对于包含例外李代数的李代数族F,其伴随表示ad的张量幂ad^n的分解律的一致性现在是众所周知的。本文使用它来着手发展一个统一的张量演算的例外李代数。它明确地处理所有的张量,出现在n=2的阶段,获得了大量的系统信息,他们的性质和身份,满足他们。在n=3的水平上得到了一些结果,包括对ad ^[3]的所有组分的维数和卡西米尔本征值数据的简单推导。这是重要的输入数据,用于处理在n=3的水平上进入图像的所有张量的集合,遵循已知的对a_1可行的路径。本文描述了李代数d_4与例外李代数在族F中的位置一致的特殊方式。

英文摘要:

The uniformity of the decomposition law, for a family F of Lie algebras which includes the exceptional Lie algebras, of the tensor powers ad^n of their adjoint representations ad is now well-known. This paper uses it to embark on the development of a unified tensor calculus for the exceptional Lie algebras. It deals explicitly with all the tensors that arise at the n=2 stage, obtaining a large body of systematic information about their properties and identities satisfied by them. Some results at the n=3 level are obtained, including a simple derivation of the the dimension and Casimir eigenvalue data for all the constituents of ad^3. This is vital input data for treating the set of all tensors that enter the picture at the n=3 level, following a path already known to be viable for a_1. The special way in which the Lie algebra d_4 conforms to its place in the family F alongside the exceptional Lie algebras is described.

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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