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Is Facebook’s graph theory algorithm working fine?

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I’m not sure how many of you have noticed this but there are days when your count of friends on Facebook fluctuates up and down. Not by much, mind you… maybe 1 or 2, sometimes even 3. And I’d be wrong to say that it fluctuates up and down… it usually goes down, then comes … Read more

Four degrees of separation

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The idea of six degrees of separation was expressed by Frigyes Karinthy in 1929 and for the past few decades, it has been part of our consciousness with respect to how the world is shrinking. However, more 80 years later, I find it surprising that no one has revised the degree of six downwards. Today … Read more