Extended directed triple systems
Extended directed triple systems
复制标题
DOI：
10.1016/j.disc.2005.12.022
复制
发表时间：
2006-07
期刊：
影响因子：
--
通讯作者：
Wen-Chung Huang
中科院分区：
文献类型：
--
作者：
Wen-Chung Huang
令{n;b2,b1}表示n阶扩展有向三元组，其中[a,b,a]形式的块的数量为b2，[b,a,a]或[a,a,b]形式的块的数量为b1。在本文中，我们证明了类{n;b2,b1}存在的充分必要条件是b1≠1，0⩽b2+b1⩽n并且
Let {n;b2,b1} denote the class of extended directed triple systems of the order n in which the number of blocks of the form [a,b,a] is b2and the number of blocks of the form [b,a,a] or [a,a,b] is b1. In this paper, we have shown that the necessary and sufficient condition for the existence of the class {n;b2,b1} is b1≠1, 0⩽b2+b1⩽n and