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arXiv math-ph/0005002math-phhep-thmath.MP
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融合规则的函数生成方法

Generating-function method for fusion rules

L. Begin, C. Cummins, P. Mathieu

摘要:

这是第二次的两篇文章致力于阐述的生成函数的方法计算融合规则仿射李代数。本论文的重点是融合规则,使用配套文章中的张量积开发的机器。虽然卡茨-沃尔顿算法提供了一种方法,从相应的张量积生成函数构建一个融合生成函数,我们描述了一个更强大的方法,首先定义一组融合的基本耦合从一组张量积基本耦合的自然扩展。利用Farkas引理,导出了一组涉及水平的不等式.这些不等式与定义张量积的不等式一起定义了我们所说的融合基。在此基础上,我们以前的论文的机器可以应用于构建融合生成函数。给出了sp(4)和su(4)的新的生成函数及其阈值的封闭形式表达式。

英文摘要:

This is the second of two articles devoted to an exposition of the generating-function method for computing fusion rules in affine Lie algebras. The present paper focuses on fusion rules, using the machinery developed for tensor products in the companion article. Although the Kac-Walton algorithm provides a method for constructing a fusion generating function from the corresponding tensor-product generating function, we describe a more powerful approach which starts by first defining the set of fusion elementary couplings from a natural extension of the set of tensor-product elementary couplings. A set of inequalities involving the level are derived from this set using Farkas' lemma. These inequalities, taken in conjunction with the inequalities defining the tensor products, define what we call the fusion basis. Given this basis, the machinery of our previous paper may be applied to construct the fusion generating function. New generating functions for sp(4) and su(4), together with a closed form expression for their threshold levels are presented.

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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