Mathematica Choosing the Best Symbolic Language for Mathematical Manipulation on a PC

[Phrak]

Any recommendations on other Mathematica packages that can calculate the Einstein_tensor?
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Just off hand, given the Ricci tensor and metric in covariant form, it shouldn't be too difficult to obtain the Einstein tensor using matrix operations. Both are rank two tensors. It's involves only matrix addition and scalar multiplication of a matrix, plus finding the trace of the Ricci tensor, where the covariant form is implicit.

Ultimately, I plead ignorance of all this for the most part, being fairly new at it. Hope this can help, anyway.

 

[joelupchurch]

This is kind of an out of the box suggestion, but what about Wolfram Alpha? It is convenient to have the tools available in any web browser, even an i-phone.

http://www.wolframalpha.com/examples/"