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Student Support Forum: 'FullSimplify: Mathematica 9 vs. Mathematica 8' topicStudent Support Forum > General > "FullSimplify: Mathematica 9 vs. Mathematica 8"

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Author Comment/Response
Steve Keeley
12/31/12 3:57pm

I opened your file in M8 and evaluated the notebook. It ran rapidly until the line in input 17 that reads:

riem = ered[
Table[D[gam[[i, j, l]], co[[k]]] - D[gam[[i, j, k]], co[[l]]] +
Sum[gam[[i, p, k]] gam[[p, j, l]] -
gam[[i, p, l]] gam[[p, j, k]], {p, 4}], {i, 4}, {j, 4}, {k,
4}, {l, 4}]];

That line generated four errors:

Part::partd: Part specification gam[[1,1,1]] is longer than depth of object. >>

Part::partd: Part specification co[[1]] is longer than depth of object. >>

Part::partd: Part specification gam[[1,1,1]] is longer than depth of object. >>

General::stop: Further output of Part::partd will be suppressed during this calculation. >>

After that it just kept running and I aborted the rest.

M9 hangs up at the same spot.

URL: ,

Subject (listing for 'FullSimplify: Mathematica 9 vs. Mathematica 8')
Author Date Posted
FullSimplify: Mathematica 9 vs. Mathematica 8 xenos1984 12/31/12 07:27am
Re: FullSimplify: Mathematica 9 vs. Mathematica 8 Steve Keeley 12/31/12 3:57pm
Re: Re: FullSimplify: Mathematica 9 vs. Mathema... xenos1984 12/31/12 4:26pm
Re: Re: Re: FullSimplify: Mathematica 9 vs. Mat... jf 01/01/13 5:42pm
Re: Re: Re: Re: FullSimplify: Mathematica 9 vs.... xenos1984 01/03/13 5:24pm
Re: Re: Re: Re: Re: FullSimplify: Mathematica 9... Steve Keeley 01/05/13 6:16pm
Re: Re: Re: Re: Re: Re: FullSimplify: Mathemati... xenos1984 01/07/13 5:03pm
Another "long M9 calculation time" test case xenos1984 01/08/13 06:47am
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