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Calculate the following Riemann tensor?

Posted 5 months ago
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Hi,

What code should I use to calculate the Rieman tensor?

grcalc[R[**up**,dn,dn,dn]] 

or

grcalc[R[dn,dn,dn,**up**]]

What is the Mathematica index priority? Thanks for your help.

Riemann

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