Tensor contraction in mathematica

By mrcarlis at Tue, Aug 3 2010 8:04am |

Hi

I am not sure this is the best forum for this question, but mathematicas forum are so messy. How does one do contractions of tensors in mathematica? I have the following situation:

A_{ijkl}=Q_{mnop}D_{mi}D_{nj}D_{ok}D_{pl}

Thus, D defines a transformation of variables that I want to do. Is there any way of writing this down in mathematica?

Best
Carlis

‹ ROOT with Cocoa Mathcalculations with C or C++ ›

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Sat, 2010-08-14 07:39 — vokuhila

I've used the Ricci package

I've used the Ricci package before. It's pretty easy to use, and I haven't been able to break it yet.

http://www.math.washington.edu/~lee/Ricci/