Re: [math-fun] Nontrivial actions of PSL(2, p) on p points exist only for p = 2, 3, 5, 7, 11

Thanks, Mike!!! The articles, posted in late 2010 and early 2011, look terrific and will keep me occupied for a long time. On the other hand, I was able to find only articles I through XI, and XI promised there would be two more. Do you know how many are available? --Dan On 2013-07-19, at 7:47 AM, Mike Stay wrote: Here's a wonderful sequence of articles by Tim Silverman depicting modular curves. In particular, he considers actions of the modular group on Z/nZ. < https://www.google.com/search?q=site%3Agolem.ph.utexas.edu%2Fcategory%2F+"pictures+of+modular+cu rves"