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Definition of inertial frame in GR?

  1. Feb 25, 2013 #1
    How do we mathematically define a inertial frame in GR?
    Is it only a basis in some tangentspace or does it have to be induced by a coordinatechart? :/
     
  2. jcsd
  3. Feb 25, 2013 #2

    Ben Niehoff

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    It's only a basis in the tangent space. But you can always find local coordinates that induce this basis at a single point. They are called normal coordinates.
     
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