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GRtensorII:maple users help needed

  1. Nov 16, 2004 #1
    I found the GRtensor package very handy in tensor calculus.
    However while doing coordinate transformation to the metric is a piece of cake, I have now idea how to transform a general tensor (for example T(mu,nu) or whatever).
    there must be a way (an easy one) to do this. please advise.
  2. jcsd
  3. Dec 6, 2004 #2
    no one answered but over a hundred people read my message so I thought I write down the somewhat messy solution I found:
    1. define new metric which identical to the tensor to be transformed.
    this is easily done using grnewmetric(...);
    2. transform the new metric using grtransform(...)
    3. define and calc the tensor eq: `Tnew{a b}:=gnew{a b}`
    hope it helps somebody.
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