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February 28th, 2017, 02:51 PM  #1 
Newbie Joined: Feb 2017 From: Brazil Posts: 1 Thanks: 0  Differential equation of function composition of two variables.
Morning All. I have a system I am completely stuck on. Differential equation of function composition of two variables. I need find a numerical solution of this system, like f(x(t),y(t)) = ... Any Help Regards 
March 1st, 2017, 07:08 AM  #2 
Senior Member Joined: Sep 2016 From: USA Posts: 273 Thanks: 140 Math Focus: Dynamical systems, analytic function theory, numerics 
Is this a stiff problem in the region of phase space you are interested in? If not, I would just use RungeKutta. If you aren't familiar with it there is a link below but in a nutshell, its a weighted average of particular Euler steps. https://en.wikipedia.org/wiki/Runge%...3Kutta_methods Hope this helps. 
March 1st, 2017, 07:08 AM  #3 
Senior Member Joined: Sep 2016 From: USA Posts: 273 Thanks: 140 Math Focus: Dynamical systems, analytic function theory, numerics 
oh yeah and if the problem is stiff, Taylor expand.


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