There are a couple of typos in the post by me: I mean to say " I am trying
to end UP defining the Einstein tensor..." and on the expression g should
be with covariant indices: g(-a,-b). Sorry.
On Friday, January 10, 2014 4:56:03 PM UTC-5, Comer wrote:
>
> Today I have been looking at the sympy tensor package. I have attached a
> script in which I am trying to end of defining the Einstein tensor: R_{a b}
> - 1/2 *g_{a b} * R. But the script does not succeed on the last step of
> evaluating the above expression and hence fails to agree to create the
> Einstein tensor. I am wondering what I am doing incorrectly?
>
> Thanks for advice.
>
> Comer
>
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