Your example still fits with my (tentative) definition. For both circles, it is true that each member has exactly two friendship relations in it. My definition does not say anything about the number of overall friendship relations on the whole site, but only about friendship relations within a circle.

But I think I need a second thing in the definition, but I'm not sure which one is "better":

The two are not equivalent, because the first rule allows circles of three persons, while the latter allows circles starting at four members.

In reply to Re^3: OT(ish) - Best Search Algorithm by Corion
in thread OT(ish) - Best Search Algorithm by Melly

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