Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Problem with Lagrangian function

  1. Sep 4, 2015 #1
    Hello,
    I trying to understood some transition from one equation to another but i need a little help with that.
    So we have, a
    Screen Shot 09-05-15 at 01.02 AM.PNG
    Had problems with Latex :).
     
    Last edited: Sep 4, 2015
  2. jcsd
  3. Sep 4, 2015 #2

    Geofleur

    User Avatar
    Science Advisor
    Gold Member

    Use a Taylor expansion, ## f(x+\Delta x) \approx f(x) + \frac{df}{dx}\Delta x ## with ## f = L ##, ## x = v^2 ##, and ## \Delta x = 2v\epsilon ##.
     
  4. Sep 5, 2015 #3
    Ohh so when he said "powers series" he means "Taylor expansion", thank you :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Problem with Lagrangian function
  1. Lagrangian for fluids (Replies: 1)

  2. Lagrangian Mechanics (Replies: 4)

Loading...