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Complex Network Analysis in Python by Dmitry Zinoviev

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Discover Asymmetric Relationships

A directed network is a network that has at least one directed edge. Naturally, a directed edge is an edge that has a direction: it connects node X to node Y, but not the other way around. Mathematically, the relationship represented by a directed edge is asymmetric.

Many real-world relationships are asymmetric and, ideally, must be modeled as directed networks. Here are some examples of asymmetric or possibly asymmetric relationships:

In social networks:
  • Friendship: Alice may believe she is a friend of Bob, but Bob may have a different opinion. In the not-so-rare case when Alice and Bob are mutual friends, you can either model their friendship as an undirected edge or create two anti-parallel directed edges: ...

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