Currently I use the following code to calculate the Kretschmann scalar kr
of my metric g:
R=g.Riemann();
uR=R.up(g)
dR=R.down(g)
kr=uR['^{abcd}']*dR['_{abcd}']
It works, but it consumes a lot of memory: is there a more memory efficient
way to calculate the Kretschamann scalar?
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