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

What does " to first order" mean ?

  1. Aug 26, 2015 #1

    dyn

    User Avatar

    Hi. When using approximations such as g = n + h where h is much less than n ; what does " valid to first order in h" mean ? Does it mean include terms linear in h or does it mean drop those terms ?
    Thanks
     
  2. jcsd
  3. Aug 26, 2015 #2

    andrewkirk

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    It's the former. It's based on the idea of the amount - g in this case - being expressed as a Taylor series in h. To first order means including the constant term and the term that has ##h^1## but excluding all other terms that have ##h^k## for ##k>1##.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What does " to first order" mean ?
  1. What does Ept mean? (Replies: 1)

  2. What does "det" mean? (Replies: 6)

Loading...