Re: System of equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg18365] Re: System of equations*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 30 Jun 1999 14:13:29 -0400*Organization*: Universitaet Leipzig*References*: <7l0lon$cun@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, f'[x]==g[x]*h[x] f[x]==g[x]*h[x] gives f'[x]==f[x] and f[x]-> Exp[x] h[x]==2 x gives h[x]-> x^2 and for what do you need Mathematica ? Regards Jens Alexander Sirotkin wrote: > > I need to solve a system of equations, some of which are > regular differential equations and some not (something > like f'(x) = g(x)*h(x), h'(x) = 2x and f(x) = h(x)*g(x) > but more complex so that I can't just replace f(x) with > h(x)*g(x)). > > NDSolve refuses to work with some weird error messages... > > Is there any way to solve such kind of system ? > > P.S. .nb file with mathematica source is in my previous posting...