For the rank into rank and closely related pages, how much detail are we looking for?
Let's be flexible about this. At first, I think a summary account would be completely fine, giving the basic definition and basic facts, without any proofs. As the site develops, my expectation is that our standards will rise, and we will want fuller and fuller accounts of the cardinal concepts, with increasingly robust links to the professional literature, when these exist. (By the way, you can and should sign your talk posts with four tildes ~~~~, and it generates a username timestamp.) JDH 16:40, 10 January 2012 (PST)