Open Problem Garden - derivative - Comments http://www.openproblemgarden.org/category/derivative Comments for "derivative" en derivative http://www.openproblemgarden.org/category/derivative <br /> http://www.openproblemgarden.org/category/derivative#comment Sat, 17 May 2008 05:53:08 +0200 mdevos 795 at http://www.openproblemgarden.org