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Contracting tensors

  1. Mar 19, 2013 #1
    When contracting [itex]R^{\sigma}_{ \mbox{ }\mu\nu\rho}[/itex] to [itex]R_{\mu\nu}[/itex]

    Should one multiply by [itex]g^{\alpha\rho}g_{\alpha\sigma}[/itex]? I often get confused with ordering of indices and such like
     
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  3. Mar 19, 2013 #2

    Fredrik

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  4. Mar 19, 2013 #3
    there was no real answer, ignore the ricci tensor i just mean in general then, I don't really understand the order in which the indices should go, if it even matters at all.
     
  5. Mar 19, 2013 #4

    Fredrik

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    If you're not satisfied with the answers, you should say that in the same thread, not start a new one.
     
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