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Time: 2007/11/18 18:28:05 GMT-8
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Computing Christoffel symbols in Maxima
\begin{maxima}
load(ctensor);
depends([a,b],[t,r]);
ct_coords:[t,r,O,P];
lg:ident(4);
lg[1,1]:-exp(2*a);
lg[2,2]:exp(2*b);
lg[3,3]:r^2;
lg[4,4]:r^2*sin(O)^2;
cmetric();
ug;
christof(mcs);
\end{maxima}
Computing Christoffel symbols in Maxima
maxima
(%i2) load(ctensor)
maxima
<latex>\mbox{\verb|f|}\mbox{\verb|i|}\mbox{\verb|l|}\mbox{\verb|e|}
\mbox{\verb|_|}\mbox{\verb|s|}\mbox{\verb|e|}\mbox{\verb|a|}
\mbox{\verb|r|}\mbox{\verb|c|}\mbox{\verb|h|}\mbox{\verb|1|}
\mbox{\verb|:|}\mbox{\verb| |}\mathrm{ctensor}\mbox{\verb| |}
\mbox{\verb|n|}\mbox{\verb|o|}\mbox{\verb|t|}\mbox{\verb| |}
\mbox{\verb|f|}\mbox{\verb|o|}\mbox{\verb|u|}\mbox{\verb|n|}
\mbox{\verb|d|}\mbox{\verb| |}\mbox{\verb|i|}\mbox{\verb|n|}
\mbox{\verb| |}\mbox{\verb|f|}\mbox{\verb|i|}\mbox{\verb|l|}
\mbox{\verb|e|}\mbox{\verb|_|}\mbox{\verb|s|}\mbox{\verb|e|}
\mbox{\verb|a|}\mbox{\verb|r|}\mbox{\verb|c|}\mbox{\verb|h|}
\mbox{\verb|_|}\mbox{\verb|m|}\mbox{\verb|a|}\mbox{\verb|x|}
\mbox{\verb|i|}\mbox{\verb|m|}\mbox{\verb|a|}\mbox{\verb|,|}
\mbox{\verb|f|}\mbox{\verb|i|}\mbox{\verb|l|}\mbox{\verb|e|}
\mbox{\verb|_|}\mbox{\verb|s|}\mbox{\verb|e|}\mbox{\verb|a|}
\mbox{\verb|r|}\mbox{\verb|c|}\mbox{\verb|h|}\mbox{\verb|_|}
\mbox{\verb|l|}\mbox{\verb|i|}\mbox{\verb|s|}\mbox{\verb|p|}
\mbox{\verb|.|}</latex>
-- an error. To debug this try: debugmode(true);
