$C$ be a binary self-dual code with an automorphism $g$ of ord'/> Automorphisms of Order in Binary Self-Dual Extremal Codes of Length a Multiple of 24
首页> 外文期刊>IEEE Transactions on Information Theory >Automorphisms of Order in Binary Self-Dual Extremal Codes of Length a Multiple of 24
【24h】

Automorphisms of Order in Binary Self-Dual Extremal Codes of Length a Multiple of 24

机译:长度为24的倍数的二进制自对偶极值代码中的阶自同构

获取原文
获取原文并翻译 | 示例
           

摘要

Let $C$ be a binary self-dual code with an automorphism $g$ of order $2p$, where $p$ is an odd prime, such that $g^{p}$ is a fixed point free involution. If $C$ is extremal of length a multiple of 24, all the involutions are fixed point free, except the Golay Code and eventually putative codes of length 120. Connecting module theoretical properties of a self-dual code $C$ with coding theoretical ones of the subcode $C(g^{p})$ which consists of the set of fixed points of $g^{p}$, we prove that $C$ is a projective $ {BBF }_{2}langle g rangle $-module if and only if a natural projection of $C(g^{p})$ is a self-dual code. We then discuss easy-to-handle criteria to decide if $C$ is projective or not. As an application, we consider in the last part extremal self-dual codes of length 120, proving that their automorphism group does not contain elements of order 38 and 58.
机译:假设 $ C $ 是具有自同构性的二进制自对码 $ 2p $ 的“ TeX“> $ g $ ,其中 $ p $ 是一个奇数素数,因此 $ g ^ { p} $ 是不动点对合。如果 $ C $ 的极值长度为24的倍数,则除Golay码和最终假定长度为120的代码。将自对偶代码的模块理论属性 $ C $ 与其中子代码 $ C(g ^ {p})$ ,它由 $ g ^ {p} $ ,我们证明 $ C $ 是一个射影 $ {BBF} _ {2} langle g rangle $ -模块,当且仅当如果 $ C(g ^ {p})$ 的自然投影是自对偶代码。然后,我们讨论易于处理的标准来确定 $ C $ 是否射影。作为应用,我们在最后一部分考虑了长度为120的极值自对偶代码,证明了其自同构组不包含38和58阶的元素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号