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arXiv math-ph/0608018math-phmath.MP
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低维李代数的压缩

Contractions of Low-Dimensional Lie Algebras

Maryna Nesterenko, Roman Popovych

摘要:

有限维李代数的连续压缩的理论背景是严格制定和发展。特别是,已知的收缩的必要条件被收集,并提出了新的标准。一些必要的不变和半不变量计算广泛的类李代数,包括所有低维李代数。提出了一种处理单参数压缩的算法,并将其应用于低维李代数。通过对压缩的必要判据的深入应用和对实李代数与复李代数之间的对应关系的研究,构造了维数不大于4的复李代数和实李代数的所有单参数连续压缩.详细讨论了低维李代数的层和余层。多参数和重复收缩的性质也进行了研究。

英文摘要:

Theoretical background of continuous contractions of finite-dimensional Lie algebras is rigorously formulated and developed. In particular, known necessary criteria of contractions are collected and new criteria are proposed. A number of requisite invariant and semi-invariant quantities are calculated for wide classes of Lie algebras including all low-dimensional Lie algebras. An algorithm that allows one to handle one-parametric contractions is presented and applied to low-dimensional Lie algebras. As a result, all one-parametric continuous contractions for the both complex and real Lie algebras of dimensions not greater than four are constructed with intensive usage of necessary criteria of contractions and with studying correspondence between real and complex cases. Levels and co-levels of low-dimensional Lie algebras are discussed in detail. Properties of multi-parametric and repeated contractions are also investigated.

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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