This blog post seems to be copied from http://20bits.com/articles/graph-theory-part-iii-facebook/ http://20bits.com/articles/graph-theory-part-iii-facebook/ wit

This blog post seems to be copied from http://20bits.com/articles/graph-theory-part-iii-facebook/ http://20bits.com/articles/graph-theory-part-iii-facebook/ without any attribution. It was also posted on yc only two weeks ago (see http://news.ycombinator.com/item?id=2912073 http://news.ycombinator.com/item?id=2912073 for commentary).