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> It depends on the definition of social network - in most of
> social network analysis software (Pajek, Ucinet, NetMiner, ...)
> properties of vertices (sex, race) are considered as a part of
> the network description. The network can also be weighted,
> multirelational, temporal, defined on several sets, ...
> The notion could be extended also to consider k-nary relations,
> k > 2. There are some examples for k=3 (Lazega's leverage relation).
However, in the case of "gender"--instead of "sex"--it would be different
story, wouldn't it?
Best wishes, Loet
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