*To*: mathgroup@smc.vnet.net*Subject*: [mg11085] Differential Equation evaluation*From*: Spooky <SLKBC@cc.usu.edu>*Date*: Sun, 22 Feb 1998 14:55:12 -0500

Hi, I am new to Mathematica and just bought verison 3.0, I am trying to solve a differential equation of the form: F''' + F*F' + 1 - (F')^2 == 0 with boundry conditions for F, F', F'' at 0 and F' at infinity, is there a way to handle this? When I try this, if I include that boundry condition at infinity with the others, Mathematica tells me I have to many constraints, if I leave it off I can solve it, if I leave off the condition for F' at 0, it tells me it can't find the value of variable at the variable at 0. So, my question, is how do I handle this in Mathematica. I have another general question about the system. I am using version 3.0 for Win95. Often, if I make a syntax error, Mathematica will print me an error message but then I can't be certain that any subsequent error messages are valid. The reason I say this is that I will find my error, correct it and then I will get another error message upon evaluation. After struggling with it for a while, I will close it and re-enter and what gave me errors prior to re-entering, evaluate fine. Is there some way to be sure that the errors are valid? Thanks for all of your help. Shayne C. Rich SLKBC@cc.usu.edu

**Follow-Ups**:**Re: Differential Equation evaluation***From:*seanross@worldnet.att.net