图论一般图的定义是什么

一般图就是图,只是相对于特殊的图[诸如：简单图,二分图等]特别强调一下.
“顶点x相关联的边的数目叫做该顶点的度数”,这个不准确
The degree of a vertex is the number of edges that connect to it,where an edge that connects to the vertex at both ends (a loop) is counted twice.
就是说(x,x)这样的边要统计两次.