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authorschnetter <schnetter@906471b6-c639-44d1-9ea0-3e3d6879f074>2006-02-27 00:47:56 +0000
committerschnetter <schnetter@906471b6-c639-44d1-9ea0-3e3d6879f074>2006-02-27 00:47:56 +0000
commite2289bc020e59ad1c9b8ef1385c840047f357583 (patch)
treebc646db136c4e642e8121b10588474fc8161a7f0
parente25e7cf542d0e3b557c1574362836f907d273590 (diff)
Document how to specify that a grid variable is given in a global
tensor basis. git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/SymBase/trunk@32 906471b6-c639-44d1-9ea0-3e3d6879f074
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@@ -588,6 +588,13 @@ tensor specials are
\gamma_{ij}$.
\end{description}
+By default, the basis with respect to which the tensor components are
+given is supposed to be the (local) coordinate system given by the
+grid, i.e., the coordinate directions are the ``natural'' directions
+of the grid. It is possible to specify a different basis by declaring
+a \emph{tensor basis}, which is the name of a grid function group
+containing the coordinate system.
+
\subsection{Example Tensor Type Declarations}
From CactusWave/WaveToy: