1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Help needed in writing the Hamiltonian function

  1. Sep 18, 2009 #1

    I need some help in writing the Hamiltonian function for the following dynamical systems.

    1) u''+u=A (1+2*u+3*u^2)

    2) u''+u=A/((1-u)^2);

    In both cases A is a constant and u is a function of t.

    Any help would be greatly appreciated.

    Thank you.

  2. jcsd
  3. Sep 18, 2009 #2


    Staff: Mentor

    You can write out Lagrange's equations and integrate in order to solve for the Lagrangian. Then proceed in the usual manner to get the Hamiltonian.
  4. Sep 18, 2009 #3
    Hi Thanks Dalespam,

    Actually, I am facing trouble in solving certain dynamical system. You can refer to my new thread titled "Discrepancy in the solution of a nonlinear dynamical system".
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Help needed in writing the Hamiltonian function
  1. Help Needed. (Replies: 3)

  2. Hamiltonian Function (Replies: 16)

  3. The Hamiltonian (Replies: 7)