摘要
“■”运算在逻辑代数和图论中定义形式不同，运算性质却类似，原因是对于“■”，逻辑函数集合与某个图的集合同构．
The forms of operation are different in logic algebra and graph theory. But the properties of the operations are similar. The reason is that there is an isomorphism between the set of logic functions and set of some graphs.
关键词
运算符号
异或
环和
逻辑代数
图论
Symbol of operation Symmetric difference Union losing intersection Isomorphism Boolean algebra Graph theory
