farfromdaijoubu
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- Question about the matrix form of a metric transformation from coordinate system to another.
The transformation of the metric from unprimed to primed coordinates is given in Moore's GR workbook as:
##g'_{uv} = \frac{\partial x^a}{\partial x^{'u}}
\frac{\partial x^b}{\partial x^{'v}}g_{ab}##
In matrix form, by matching indices on both sides (so that u and v are the outer 'indices'), I got
##(g'_{uv}) = \left(\frac{\partial x^a}{\partial x^{'u}}\right)^T (g_{ab})
\left( \frac{\partial x^b}{\partial x^{'v}} \right)##
But on pg. 146 of Schutz's GR textbook, he writes the matrix form of the transformation as $$(g') = $(\Lambda) (g) \Lambda)^T$$, where ##\Lambda = \left(\frac{\partial x^a}{\partial x^{u'}} \right)##.
How did he get this result? Did I misunderstand something? Because I don't think it's equivalent to what I got...
Thanks
##g'_{uv} = \frac{\partial x^a}{\partial x^{'u}}
\frac{\partial x^b}{\partial x^{'v}}g_{ab}##
In matrix form, by matching indices on both sides (so that u and v are the outer 'indices'), I got
##(g'_{uv}) = \left(\frac{\partial x^a}{\partial x^{'u}}\right)^T (g_{ab})
\left( \frac{\partial x^b}{\partial x^{'v}} \right)##
But on pg. 146 of Schutz's GR textbook, he writes the matrix form of the transformation as $$(g') = $(\Lambda) (g) \Lambda)^T$$, where ##\Lambda = \left(\frac{\partial x^a}{\partial x^{u'}} \right)##.
How did he get this result? Did I misunderstand something? Because I don't think it's equivalent to what I got...
Thanks