The site doesn't seem to mention it but the article is from the Monthly [1], which has a focus on exposition. Still, assuming some analysis seems fair. [1] htt

The site doesn't seem to mention it but the article is from the Monthly [1], which has a focus on exposition. Still, assuming some analysis seems fair. [1] http://www.jstor.org/stable/2308411 http://www.jstor.org/stable/2308411