Group Theory in the Bedroom [pdf]

(2005) Some discussions in (on 404 links):

2016 (62 points, 14 comments) https://news.ycombinator.com/item?id=11739294

2011 (65 points, 10 comments) https://news.ycombinator.com/item?id=2928627

2010 (38 points, 12 comments) https://news.ycombinator.com/item?id=1032722