differential equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg43680] differential equation*From*: "Andrew Lindsay" <andrewl at global.net.au>*Date*: Mon, 29 Sep 2003 01:47:56 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Dear MathGroup, I would also like to ask a question at this time also. I am trying to solve the following differential equation, but am not sure how to go about it. E''(z) + E'(z)*H*(1/ra - 1/z) + E(z)*(2*H/z^2 - B) = 2*H/z^3 * Integral z to L, E(t) dt. Where H, B and ra are all constants. I can supply the actual derivation of the equation in pdf form to anyone that is interested. The equation is used to solve attenuation along a pipeline. Best regards Andrew

**Follow-Ups**:**Re: differential equation***From:*Daniel Lichtblau <danl@wolfram.com>