Non-linear ODE
- To: mathgroup at smc.vnet.net
- Subject: [mg15094] Non-linear ODE
- From: engp7696 at leonis.nus.edu.sg
- Date: Sat, 12 Dec 1998 03:58:58 -0500
- Organization: National University of Singapore
- Sender: owner-wri-mathgroup at wolfram.com
Dear Sirs, I have a problem with a highly non-linear ODE of order 1. It is of the form A - (B/r(z))(1 + beta)(1 + beta + beta^2)^n == 0; where beta = z r'(z)/r(z). Whenever I solve this ODE I get some imaginary solution. For cases where n is not an integer say n=0.9, I am not able to get any solution at all (the programme runs indefinetely) although I have been able to solve the problem separately through finite-difference methods with my own code. Is there any method where I can instruct Mathematica to give me only the real the real solution of this ODE. I will be grateful to have any help on this matter. Thanks Vivek Pai @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ VIVEK PAI UNIVERSITY RESIDENCE Room : E5-03-29 #04-119, Block 224 Chemical Engineering Street 21, Bukit Batok National University of Singapore Singapore 650224 Singapore 119260 Phone : 8971197 Phone : 8742254 email : engp7696 at .nus.edu.sg @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@