1. Not finding help here? Sign up for a free 30min 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!

Zwiebach page 225

  1. Oct 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Shouldn't there be an

    [tex] \alpha_{-1}\alpha_{1} [/tex]

    added to equation 12.130 on account of equation 12.129, or is that 0 for some reason?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 28, 2007 #2
    If you work out the sum of the commutators of the terms in parentheses in equations (12.125) and (12.126), and use equation (12.128), you will find it deficient from [itex]4L_0[/itex] by exactly [itex]\alpha_{-1}\alpha_1[/itex].
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Zwiebach page 225
  1. Zwiebach page 234 (Replies: 1)

  2. Zwiebach page 258 (Replies: 0)

  3. Zwiebach page 292 (Replies: 3)

  4. Zwiebach page 299 (Replies: 1)

  5. Zwiebach page 287 (Replies: 1)