
Preview onto version 0.3.4
Here you can do some experiments with Rascal. The computation time is
restricted to about 10 secs to prevent high load on server.
Have a look at the documentation or at the examples. If you see wrong plots reload may help.
You job is cancelled as soon someone else accesses this page, so consider a
local installation.
Rascal-toolbox-0.3.4 (C) 2001,2002 Sebastian Ritterbusch
Enter 'help' for help or 'licence' for information about licence and warranty.
"rascal.rc loaded, predefined e, i, pi"
>"Matrix Pre-Conditioning with midpoint-inverse";
>
>condinv(A)=inv(inv(mid(A))*A)*inv(mid(A));
>
>A=[[1,1.125] 2;3 4];
>
>inv(A)
[[ -3.5000000001, -1.4814814814] [ 0.8888888888, 1.5000000001];[ 1.3333333333, 2.2500000001] [ -0.7500000001, -0.5000000000]]
>diam(inv(A))
[ 2.0185185185 0.6111111111; 0.9166666667 0.2500000000]
>
>condinv(A)
[[ -2.6666666667, -1.9999999999] [ 0.9999999999, 1.3333333334];[ 1.4285714285, 2.0000000001] [ -0.7500000001, -0.4642857142]]
>diam(condinv(A))
[ 0.6666666667 0.3333333333; 0.5714285714 0.2857142857]
>
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