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| Here's my rewrite of one of the notebooks at http://web.physics.ucsb.edu/~gravitybook/mathematica.html. [mcode]rewritten from http://web.physics.ucsb.edu/~gravitybook/math/curvature.pdf In[5]:= n = 4; In[6]:= coord = {r, \[Theta], \[Phi], t}; ... |