Solve for DEQ

*To*: mathgroup at smc.vnet.net*Subject*: [mg13505] Solve for DEQ*From*: Jaume Terradas <jaume at hubble.uib.es>*Date*: Fri, 31 Jul 1998 04:33:21 -0400*Organization*: Universitat de les Illes Balears*Sender*: owner-wri-mathgroup at wolfram.com

Dear friends, I have a problem when I try to eliminate in a system of differential equations, some variables. Using the command Solve, Mathematica eliminates the variable but gives it as a function of its derivatives, when in fact it is possible to eliminate all of them. Besides when I try to introduce a variable into a equation, Mathematica does not do the derivatives. Any help would be appreciated. Jaume