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Results tagged with general-relativity
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user 209958
A theory that describes how matter interacts dynamically with the geometry of space and time. It was first published by Einstein in 1915 and is currently used to study the structure and evolution of the universe, as well as having practical applications like GPS.
0
votes
1
answer
120
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Hodge Laplacian and scalar
I'm reading Nakahara GEOMETRY, TOPOLOGY AND PHYSICS now.Then, Hodge Laplacian is given by
\begin{align}
\Delta=(d+d^{\dagger})^2=dd^{\dagger}+d^{\dagger}d
\end{align}
For example, we consider 0-form $ …
- 125
0
votes
1
answer
385
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Tensor contraction and covariant derivative
I have naive question about GR and Covariant derivative.
You know
\begin{align}
\nabla_{\gamma} g_{\alpha \beta}=\nabla_{\gamma} g^{\alpha \beta}=0
\end{align}
And I would like to compute covariant de …
- 125