Musical notation was the first graph in Western culture.

音乐记谱法是西方文化中第一种图示法。

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Secondly, the notation of state graph of networks is presented, and the stability of the networks is studied by using the method of graph theory.

其次，提出网络的状态图的概念，通过图论中的方法对网络的稳定性进行了研究。

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Secondly, the notation of state graph of networks is presented, and the stability of the networks is studied by using the method of graph theory.

其次，提出网络的状态图的概念，通过图论中的方法对网络的稳定性进行了研究。

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