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arXiv 1802.03342math.RAmath.GRmath.OA
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轴代数的码代数及其$\mathbb{Z}_2$ -分次

Code algebras which are axial algebras and their $\mathbb{Z}_2$-gradings

Alonso Castillo-Ramirez, Justin McInroy

摘要:

码代数$A_C$是通过二进制线性码$C$定义的非结合交换代数。我们研究了代码代数中的某些幂等元,我们称之为小幂等元,这些幂等元由单个非零码字确定。对于一般码$C$,我们证明了小幂等元是本原的和半单的,并计算了它们的融合律。如果$C$是一个投射码产生的共轭类的码字,我们表明,$A_C$产生的小幂等,所以,事实上,是一个轴代数。此外,我们分类时的融合规则是$\mathbb{Z}_2$ -分级。在这样做,我们展示了一个无限的家庭$\mathbb{Z}_2 \times \mathbb{Z}_2$ -分级轴代数-这些是第一个已知的例子,轴代数与非平凡的分级以外的$\mathbb{Z}_2$ -分级。

英文摘要:

A code algebra $A_C$ is a non-associative commutative algebra defined via a binary linear code $C$. We study certain idempotents in code algebras, which we call small idempotents, that are determined by a single non-zero codeword. For a general code $C$, we show that small idempotents are primitive and semisimple and we calculate their fusion law. If $C$ is a projective code generated by a conjugacy class of codewords, we show that $A_C$ is generated by small idempotents and so is, in fact, an axial algebra. Furthermore, we classify when the fusion law is $\mathbb{Z}_2$-graded. In doing so, we exhibit an infinite family of $\mathbb{Z}_2 \times \mathbb{Z}_2$-graded axial algebras - these are the first known examples of axial algebras with a non-trivial grading other than a $\mathbb{Z}_2$-grading.

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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