most recent 30 from http://mathoverflow.net 2013-05-19T00:32:27Z http://mathoverflow.net/feeds/user/14746 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/62629/textbook-recommendations-for-undergraduate-proof-writing-class/63260#63260 Dan Christensen 2011-04-28T05:59:49Z 2011-04-28T05:59:49Z

<p>Not a book, but it's free. May I humbly suggest my DC Proof software. Using a very user-friendly proof-checker, students can work through a ten-part tutorial that introduces various methods of proof. For more information, free download, testimonials, etc. visit my website at <a href="http://www.dcproof.com" rel="nofollow">http://www.dcproof.com</a></p>