Null graph

（重定向自Empty tree）

In the mathematical field of graph theory, the term "null graph" may refer either to the order-zero graph, or alternatively, to any edgeless graph (the latter is sometimes called an "empty graph").

单词	Empty tree
释义	Empty tree 原声例句西游记英文版（Journey to the West） Wukong looked at all the empty peach trees. He shook his head. " I'm in big trouble" . 悟空看着所有空空荡荡的桃树，摇了摇头：" 我惹了大麻烦了。" 英语百科 Null graph （重定向自Empty tree） In the mathematical field of graph theory, the term "null graph" may refer either to the order-zero graph, or alternatively, to any edgeless graph (the latter is sometimes called an "empty graph").
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