The $\otimes_h$-product that refers the title was introduced in 2008 as a generalization of the Kronecker product of digraphs. Many relations among labelings have been obtained since then, always using as a second factor a family of super edge-magic graphs with equal order and size. In this paper, we introduce a new labeling construction by changing the role of the factors. Using this new construction the range of applications grows up considerably. In particular, we can increase the information about magic sums of cycles and crowns.
Quivers with subadditive labelings: classification and integrability
第二作者引入了箭图的严格次可加、次可加和弱次可加标号,推广了Vinberg对无向图的定义。在我们以前的工作中,我们已经表明,箭图与严格次加标签正是表现Zamolodchikov周期性的箭图。在本文中,我们分类所有的箭图与次加标签。我们猜想他们表现出某种形式的可积性,即,作为$T$ -系统动力学进行,在每个顶点的值满足线性递归。相反,我们表明,在这个意义上的每一个可积的必然是我们的分类中的$19$项目之一。对于$\hat A \otimes A$类型的箭图,我们用圆柱多米诺平铺的分拆函数表示递归的系数,称为\emph{Goncharov-Kenyon Hamiltonians}。我们还考虑热带$T$ -系统的类型$\hat A \otimes A$和解释如何仿射切片表现出孤子的行为,即孤子的分辨率和速度守恒。在整个过程中,我们推测如何在纸上的结果预计推广从$\hat A \otimes A$到所有其他颤抖在我们的分类。
图$G$的$L(1,1)$ -标记是从$\{0,1 \cdots, k \}$到$G$的顶点的标签分配,使得相邻或具有共同邻居的两个顶点接收不同的标签。$G$的$λ_1^1-$编号$λ_1^1(G)$是$G$允许$L(1,1)$标记的最小值$k$。对于所有正的$m, n \geq 3$,我们建立了圈$C_m \times C_n$的直积的$λ_1^1-$数,其中两个$m,n$都是偶数或其中一个是偶数而另一个是奇数.