Re: coding problem
- To: mathgroup at smc.vnet.net
- Subject: [mg60184] Re: coding problem
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Tue, 6 Sep 2005 05:28:49 -0400 (EDT)
- Organization: Uni Leipzig
- References: <dfj9bg$rfm$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, a) the function name is DSolve[] with a b) you can reduce the order of the ode with u[x]==y'[x] and you get DSolve[{x*u'[x] + (1 + x)*u[x] == 0}, u[x], x] c) from this solution, you see that it will never converge at x==0 Regards Jens "Ming Hong" <zhongming at gmail.com> schrieb im Newsbeitrag news:dfj9bg$rfm$1 at smc.vnet.net... |I am trying to solve the following equations: | | xy''+(1+x)y'=0 | xy'(0)=-1/2 | y(Infinity)=0 | | Here is what I put into Mathematica: | | Dsolve[{x*y''[x]+(1+x)*y'[x]==0,x*y'[0]==-1/2,y[Infinity]==0},y,x] | | It didn't work and I can not figure out why. | | Thanks for your help! | | Ming |