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Phase Portrait

• To: mathgroup at smc.vnet.net
• Subject: [mg76209] Phase Portrait
• From: herato <herato at gmail.com>
• Date: Thu, 17 May 2007 06:58:40 -0400 (EDT)

Hi!
I would like to plot a simple phase portrait of some standard equation
such as the pendulum .

How to do it?

It is completely equivalent to plot sublevels of the Hamiltonian, but
in this case Mathematica does not plot the separatrix.....


Thanks a lot!!!!

• Follow-Ups:
  • Re: Phase Portrait
    • From: Murray Eisenberg <murray@math.umass.edu>
  • Re: Phase Portrait
    • From: Ruth <ruth.lazkoz@ehu.es>