Furthermore, we also describe a characterization of the symmetric digraph with odd girth r whose exponent is equal to 2n-r-1. 并刻划了指数为2n-r-1的奇围长为r的对称图的特征。
The exponent set of symmetric digraph with odd girth R 奇围长为r的对称图的指数集
In this paper, we prove that every 2-local derivation from any symmetric digraph algebra into itself is a derivation. Moreover, we give an example to show that the conclusion may not be true if it has not the condition of symmetry. 本文证明了对称digraph代数上的每一个2-局部导子都是导子,并给出一个例子说明该结论在非对称digraph代数上不成立。