arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.3202math.CO
收藏

基于置换码的Han双射

Han's Bijection via Permutation Codes

William Y. C. Chen, Neil J. Y. Fan, Teresa X. S. Li

摘要:

我们表明,韩的双射时,仅限于置换可以进行的循环主要码和循环逆码。换句话说,它将具有循环主码$(s_1, s_2, ..., s_n)$的置换$π$映射到具有循环逆码$(s_1,s_2, ..., s_n)$的置换$σ$。我们还证明了Han映射的不动点可以用Foata第二基本变换的强不动点刻画.强不动点的概念与Björner和Wachs引入的部分Foata映射有关。

英文摘要:

We show that Han's bijection when restricted to permutations can be carried out in terms of the cyclic major code and the cyclic inversion code. In other words, it maps a permutation $π$ with a cyclic major code $(s_1, s_2, ..., s_n)$ to a permutation $σ$ with a cyclic inversion code $(s_1,s_2, ..., s_n)$. We also show that the fixed points of Han's map can be characterized by the strong fixed points of Foata's second fundamental transformation. The notion of strong fixed points is related to partial Foata maps introduced by Björner and Wachs.

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。

↑