Question: Finding contravariant bases vectors and its component with Tensor

In preparation for learning GR, I need somme trick on how to use the DifferentialGEometry package or else. So I want to show you what I want to do (see the link to the document below) and I would like some help on how to do it with tensor.  That would help me a lot.  Then, I will extansion it on a 3-D problem and next in 4-D.


Thank you in advance dor your help


here is the file :


Mario Lemelin
Maple 2015 Ubuntu 14.04 - 64 bits
Maple 2015 Win 10 - 64 bits messagerie : téléphone :  (819) 376-0987
Please Wait...