non-linear equations not covered by built-in procedures
- To: mathgroup at smc.vnet.net
- Subject: [mg38809] non-linear equations not covered by built-in procedures
- From: mathma18 at hotmail.com ("Narasimham G.L.")
- Date: Tue, 14 Jan 2003 06:10:37 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
I am a beginner with Mathematica. Apprecite help for non-linear
diffrl. equns.
eqn = r''[t] + 1/r[t] == 0
sol = DSolve[{eqn, r[0] == 1, r'[0] == 0}, r[t], t]
Plot[r[t] /. sol, {t, 0, 2Pi }]
carries error msg >> DSolve::dnim:
Built-in procedures cannot solve this differential equation.
The linear case when 1/r[t] is replaced by r[t] works OK,yields the
expected Cos[t] solution.
Is there a web accessible Mathematica reference for ODEs, non linear,
PDEs etc.?
Regards
- Follow-Ups:
- Re: non-linear equations not covered by built-in procedures
- From: "Bobby R. Treat" <majort@cox-internet.com>
- Re: non-linear equations not covered by built-in procedures