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Reducing third order ODE to a system of first order equs + 4th order runge-kutta

  1. Apr 14, 2009 #1

    TTM

    User Avatar

    Hi,
    I am stuck on the initial steps of this problem - its been a while since my diff. eq course.
    I need to reduce this into a system of three equations then apply a 4th order runge kutta method to solve.

    1. The problem statement, all variables and given/known data
    f'''+f*f''=0
    Boundary conditions:
    f'(0)=f(0)=0
    f'(infinity)=0

    A. Reduce this equation to a system of three first order equations, with associated boundary conditions.

    3. The attempt at a solution
    Am I on the right track?
    (equation 1) f'=g
    (2) g'=h
    (3) h'=-f*h

    how to apply boundary conditions?
     
  2. jcsd
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