Re: Derivation of Sums of Functions
- To: mathgroup at smc.vnet.net
- Subject: [mg64830] Re: Derivation of Sums of Functions
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Sun, 5 Mar 2006 03:18:48 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <du6nue$5pg$1@smc.vnet.net> <du841h$t25$1@smc.vnet.net> <dubh7e$fp3$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Jochen Haller wrote: > No, I am looking for an easy construct to solve a problem like this: > > Derivate the sum from t=0 to T over the expression: > > x_t * (k_t - k_(t-1)) > > with respect to k_t, where the subscript means the index. > > JH > Hi Jochen, The following threads may be of interest: http://groups.google.fr/group/comp.soft-sys.math.mathematica/browse_thread/thread/32e4058ba61f6502/357205d529f01c67?q=derivative+sum&rnum=2&fwc=1 http://groups.google.fr/group/comp.soft-sys.math.mathematica/browse_thread/thread/4ce3ac02c26ba97e/2046ef127f7c5860?q=derivative+sum&rnum=7#2046ef127f7c5860 Best regards, /J.M.