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arXiv 1106.0133math.RA
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矩阵分次恒等式的图论方法

A graph theoretic approach to graded identities for matrices

Darrell Haile, Michael Natapov

摘要:

本文考虑复数上k × k矩阵代数M_k(C),通过正则表示将G嵌入对称群S_k中,并按通常的方法将S_k嵌入M_k(C)中,将M_k(C)看作与k阶群G的交叉积.这在M_k(C)上导出了一个自然的G-分次,我们称之为交叉积分次。这种分级是由任意k元组(g_1,g_2,.,g_k)的集合。本文研究了M_k(C)具有交叉积分次的分次多项式恒等式.对于自由分次代数中的每一个多线性单项式,我们关联一个有向标号图。这种方法使我们能够给出新的证明已知的结果Bahturin和Drensky的生成元的T-理想的身份和Amitsur-Levitsky定理。我们最重要的新结果是确定了M_k(C)的G-分次余维数的渐近公式。

英文摘要:

We consider the algebra M_k(C) of k-by-k matrices over the complex numbers and view it as a crossed product with a group G of order k by embedding G in the symmetric group S_k via the regular representation and embedding S_k in M_k(C) in the usual way. This induces a natural G-grading on M_k(C) which we call a crossed product grading. This grading is the so called elementary grading defined by any k-tuple (g_1,g_2,..., g_k) of distinct elements g_i in G. We study the graded polynomial identities for M_k(C) equipped with a crossed product grading. To each multilinear monomial in the free graded algebra we associate a directed labeled graph. This approach allows us to give new proofs of known results of Bahturin and Drensky on the generators of the T-ideal of identities and the Amitsur-Levitsky Theorem. Our most substantial new result is the determination of the asymptotic formula for the G-graded codimension of M_k(C).

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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