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Relativity question

  1. Oct 19, 2006 #1
    Hi all,

    I'm trying to teach myself relativity using Sean Carroll's lecture notes. Although this Isn't a homework question I thought this part of the forum was the best place to ask.

    On page 76 of http://arxiv.org/pdf/gr-qc/9712019, how have they got the first equation in (3.50) from plugging (3.49) into (3.48). I can't understand where some of the terms have gone? I must be missing something. Can someone explain how this has been achieved.

    Thanks in advance! :smile:
  2. jcsd
  3. Oct 20, 2006 #2

    George Jones

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    When you plug (3.49) into (3.48), neglect all terms that have two or deltas.
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