most recent 30 from http://mathoverflow.net 2013-05-20T03:04:12Z http://mathoverflow.net/feeds/user/957 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/1722/free-high-quality-mathematical-writing-online/1791#1791 Cristobal 2009-10-22T03:06:25Z 2009-10-22T03:06:25Z

<p>"<a href="http://joshua.smcvt.edu/linearalgebra/" rel="nofollow">Linear Algebra</a>" by Jim Hefferon has been online for a while and it was what I used to teach myself linear algebra. It's very well written with tons of great practice problems and interesting asides. It is a little less advanced than any of the other books listed so far, but it's still a great read. Plus, it's open source (You can download the LaTeX for the book from the website).</p>