Re: How to "Factorize" expanded derivatives
- To: mathgroup at smc.vnet.net
- Subject: [mg17186] Re: How to "Factorize" expanded derivatives
- From: "Hemming A Schaeffer" <has at dhi.dk>
- Date: Tue, 20 Apr 1999 01:20:59 -0400
- Organization: Customer at Tele Danmark Erhverv
- References: <7f9evt$50m@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Thanks to a couple of people providing me with a personal response on how the functions Integrate and Hold can be used to solve the specific problem I posed (see below). However, my final need is related to complicated expressions with multiple partial derivatives. Thus, the function I am looking for is one, which is able to experiment a little (like Simplify) on how to arrange (nest) partial derivatives of different orders and variables to get the most simple representation of some expression. Thanks for any new tips Hemming Hemming A Schaeffer wrote in message <7f9evt$50m at smc.vnet.net>... >Consider the operation > >D[f[x]g[x],x]=g[x]f'[x]+f[x]g'[x] > >Does anyone know how to make Mathematica perform the inverse operation. I >guess what I am looking for is some kind of Simplify Function using >differentiation rules. Something resembling the Factor Function would also >be nice. > >Thanks for any tips > >Hemming > > > > >