Hamilton's equations for double pendulum

  1. At the bottom of the following web site are the 4 equations that I am using for a double pendulum simulation.

    http://scienceworld.wolfram.com/physics/DoublePendulum.html

    The equation for C2 has the variables P1 and P2 and I can't work out what they are.:confused:

    Is it a typo and they are meant to be Pθ1 and Pθ2?

    Any help would be much appreciated.
     
  2. jcsd
  3. DrClaude

    DrClaude 2,382
    Science Advisor
    Homework Helper
    Gold Member

    Yes.
     
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