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!

Help understanding integral

  1. Mar 31, 2013 #1
    http://arxiv.org/pdf/0807.1310v5.pdf

    Equation 4.6 strikes me as wrong. The integral is [itex]\int_{0}^{\infty} B \mathrm{d}B[/itex]

    The limits of the integral seem to be values of z, but the integral seems to be wrt B. If the limits were values of B, the answer would be ∞. It's clearly not, but I don't understand this.
     
  2. jcsd
  3. Mar 31, 2013 #2
    It looks like he's cancelled the dz from numerator and denominator in 4.5 and is left with BdB, but instead of writing the limits as B(z=0) and B(z=inf), they've just written 0 and inf.

    The limits would be correct before dz were cancelled, but after, they should be changed. If this is the correct interpretation then I agree it's a little sloppy.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Help understanding integral
  1. Help understand (Replies: 17)

  2. Help to understand (Replies: 3)

Loading...