What is the friendship paradox?
The friendship paradox is the finding that, on average, your friends have more friends than you do. It is a sampling effect of network structure, not a flaw in you.
Starter thread · AI-reviewed against its sources
Mathematics
Social networks
What is the small-world effect behind six degrees of separation?
The small-world effect is the finding that large networks, including social ones, have very short paths between nodes despite being highly clustered. A few long-range links produce it.
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