tag:blogger.com,1999:blog-7056990295646173627.post8482838723313979031..comments2011-05-26T20:57:56.994+01:00John Lawrence Aspdenhttp://www.blogger.com/profile/02587130870181071109noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7056990295646173627.post-58767430449419791172011-05-26T20:57:56.994+01:002011-05-26T20:57:56.994+01:00You might want to check to sicp videos at http://groups.csail.mit.edu/mac/classes/6.001/abelson-sussman-lectures/<br /><br />There are several lectures on differentiation that might be useful, and, are fun to watch. There is a lecture that uses approximation, one that rewrites the formula s-expressions, eg (* x x) rewrites to (* 2 x), and a lecture that compiles the basic rules for differentiation to a rewrite-function that can actually do the job.<br /><br />Regards, WalterWalterhttp://www.blogger.com/profile/15105763554520443059noreply@blogger.com