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Rinvariant

Function: rinvariant () Forms the Kretchmann-invariant (kinvariant) obtained by contracting the tensors

/*  Schwarzschild simplesave as name.macLoad from the file menu - > File|Batch file*/kill(all);
load(ctensor);
/* set some flags */cframe_flag: false;
ratchristof: true;
ratriemann : true;
ratfac : true;
ctrgsimp: true;
/* define the dimension */dim: 2;
/* list the coordinates */ct_coords: [theta,phi];
/* set up the metric *//* assign to lg a matrix of zeros

lriem[i,j,k,l]*uriem[i,j,k,l].

This object is not automatically simplified since it can be very large.

(%o1)                                true
(%i2) 

Related Examples

rinvariant

? rinvariant;

Calculate

rinvariant

? rinvariant;

Calculate