Maple Transforming Tensors with GRtensorII: Maple Users Help Needed

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The discussion centers on the use of the GRtensor package for tensor calculus, specifically the challenge of transforming a general tensor. The original poster, anigma, highlights the ease of transforming metrics but struggles with tensor transformations. After receiving no responses, anigma shares a solution: first, define a new metric that mirrors the tensor to be transformed using the grnewmetric function. Next, transform this new metric with the grtransform function. Finally, the new tensor is defined and calculated as Tnew{a b} := gnew{a b}. This approach aims to assist others facing similar challenges in tensor transformations within the GRtensor framework.
anigma
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Hello.
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.
thanks,
anigma.
 
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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.
anigma.
 
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