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/* Copyright (C) 2004 Viktor T. Toth <http://www.vttoth.com/>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* Using frame fields in CTENSOR
*
*/
if get('ctensor,'version)=false then load(ctensor);
("Verify the Schwarzschild metric in tetrad base")$
("The variable cframe_flag determines if a frame base is used")$
cframe_flag:true;
("ct_coordsys() can be used to set up predefined metrics")$
verbose:true;
ct_coordsys(exteriorschwarzschild);
("A call to cmetric() computes the frame base and the metric")$
cmetric()$
fr;
lg;
("But we're not using the metric when we compute the connection")$
christof(mcs);
("We can now compute the Ricci tensor in tetrad base")$
ricci(true);
/* End of demo -- comment line needed by MAXIMA to resume demo menu */
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