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 August 10th, 2011, 12:30 PM #1 Newbie   Joined: Aug 2011 Posts: 1 Thanks: 0 How to solve ODE for independent function Hello, I need to solve numerically an equation of the form v(t) = k1*z(t)*w(t)-k2*i(t)-k3*di(t)/dt The issue is that rungekutta methods are useful for solving di(t)/dt = 1/k3 * [ k1*z(t)*w(t)-k2*i(t)-k3*-v(t) ] but I need to solve for v(t) What I did was: v (t) = k1*z(t)*w(t)-k2*i(t)-k3*[i(t)-i(t-1)]/h But is not a good approximation because the step size h cannot be small enough. I need a more sophisticated method than directly applying the difference quotient as I did. Thanks a lot! Tags function, independent, ode, solve Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post benmuskler Algebra 1 January 27th, 2013 08:44 AM sparse_matrix Linear Algebra 0 November 8th, 2012 12:40 AM jaredbeach Calculus 2 November 9th, 2011 01:26 PM luketapis Algebra 2 October 4th, 2011 03:40 PM tinatran2 Number Theory 4 May 9th, 2007 02:01 AM

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