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Unlike most areas of mathematics I'm finding it difficult to obtain standard texts.

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- Thread starter Son Goku
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Unlike most areas of mathematics I'm finding it difficult to obtain standard texts.

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Daniel.

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Thanks. I hit a wall when reading Nakahara's Geometry, Topology and Physics. In chapter 10 he takes the variation of the action of a scalar field and the Einstein-Hilbert action, equates them both to zero and ends up with the Field Equations.dextercioby said:

Daniel.

My basic problem is I don't know how to take a variation with respect to a tensor, such as the metric.

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