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Timelike vs non-spacelike

  1. Feb 11, 2009 #1

    What is the difference between a timelike and a non-spacelike curve ?
    Is it only that "non-spacelike" includes timelike and null curves, or is there another difference ?

    Thanks a lot for your help.
  2. jcsd
  3. Feb 11, 2009 #2


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    A nonspacelike can include curves whose tangent vector at each point is "either timelike or null" (not just "always timelike" or "always null").
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