arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.13615math.CO
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多重格图与完美控制

Multilattice graphs and perfect domination

Italo J. Dejter, Luis R. Fuentes, Carlos A. Martinez

摘要:

通过在$u=(u_1,\cdots,u_n)$和$v=(v_1, \ldots,v_n)$之间给出的$\mathbb{Z}^n$中的截断距离,获得格点$\mathbb{Z}^n$($0<n\in\mathbb{Z}$)的$n$维网格$Λ_n$中的完美代码,如果$|u_i-v_i|\le 1$,则作为$Λ_n$中的图形距离$h(u,v)$,对于所有$i\in\{1, \ldots,n\}$,否则作为$n+1$。这样的代码被扩展到多重格图$Γ_n$通过胶合三元$n$ -立方体沿着他们的余维1三元子立方体在这样一种方式,每个二进制$n$ -子立方体包含在一个唯一的最大格$Γ_n$。证明了$n=2$的$Γ_n$中存在无穷多个半径为2的孤立完美截短度量码,并由此猜想半径为$n$的$n>2$也存在这样的码.

英文摘要:

Perfect codes in the $n$-dimensio\-nal grid $Λ_n$ of the lattice $\mathbb{Z}^n$ ($0<n\in\mathbb{Z}$) and its quotient toroidal grids were obtained via the truncated distance in $\mathbb{Z}^n$ given between $u=(u_1,\cdots,u_n)$ and $v=(v_1, \ldots,v_n)$ as the graph distance $h(u,v)$ in $Λ_n$, if $|u_i-v_i|\le 1$, for all $i\in\{1, \ldots,n\}$, and as $n+1$, otherwise. Such codes are extended to multilattice graphs $Γ_n$ obtained by glueing ternary $n$-cubes along their codimension 1 ternary subcubes in such a way that each binary $n$-subcube is contained in a unique maximal lattice of $Γ_n$. The existence of an infinite number of isolated perfect truncated-metric codes of radius 2 in $Γ_n$ for $n=2$ is ascertained, leading to conjecture such existence for $n>2$ with radius $n$.

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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