-------------------------------------------------- From: "Dongfei Yin" <yin.dongfei@gmail.com> Sent: Friday, March 06, 2009 8:04 AM To: <boost@lists.boost.org> Subject: Re: [boost] [math] Does any one interesting in calculating derivative for a expression automatically?

You know, there are too many functions in math, so I think I can't implement all of them, the functions included in standard library is enough for me. and I will make it easy to be extended. what do you think about it, I mean how many functions should I implement.

My advice would be to make the interface for supporting math functions extensible and held at arms length. The std math functions like pow, sin etc are generally working only with native types. There are those among us that use things like GMP or rational number libraries with unlimited precision for our numerical types. In these cases we have either defined our own trig or transcendental functions or had them supplied with a 3rd party lib. It would be nice to be able to generate derivative expressions which then may be applied to these types and with the use of our specialized math functions. Hope this helps, With regards, Brandon