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Difference between R^{4} and R^{1,3}

  1. Dec 5, 2015 #1
    What's the difference between ##\Bbb R^{4}## and ##\Bbb R^{1,3}##?

    I know that the first one has metric Kronecker delta ##\delta_{ij}##. Does the second one have Minkowski metric ##g_{\mu \nu}##?
     
    Last edited: Dec 5, 2015
  2. jcsd
  3. Dec 5, 2015 #2

    Simon Bridge

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    The difference is in the context.

    The two items are set notations... a manifold defined over the sets may have whatever metric is appropriate for the maths involved. Hence: context.

    I'm guessing the context something like this:
    https://en.m.wikipedia.org/wiki/Pseudo-Riemannian_manifold
     
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