papers-we-love/papers-we-love — pull request #120 by leifwalsh (2014-05-18 14:33:33+00:00)
Title: added The LCA Problem Revisited

I like this paper because the problem is simple to describe, has a surprisingly efficient solution, but you have to fight for it. The construction turns back on itself in a cute way too, it's just a really fun proof to work through.