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Einstein field equations - Wikipedia
In the general theory of relativity, the Einstein field equations (EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution of matter within it. The equations were published by Albert Einstein in 1915 in the form of a tensor equation which related the local spacetime curvature … See more
The Einstein field equations (EFE) may be written in the form:
$${\displaystyle G_{\mu \nu }+\Lambda g_{\mu \nu }=\kappa T_{\mu \nu }}$$
where See moreIf the energy–momentum tensor Tμν is that of an electromagnetic field in free space, i.e. if the electromagnetic stress–energy tensor
Additionally, the See moreThe nonlinearity of the EFE makes finding exact solutions difficult. One way of solving the field equations is to make an approximation, namely, that far from the source(s) of gravitating matter, the gravitational field is very weak and the spacetime See more
In the Einstein field equations
• any desired steady state solution described by this equation is unstable, and
• observations … See moreIf the energy–momentum tensor Tμν is zero in the region under consideration, then the field equations are also referred to as the vacuum field equations. By setting Tμν = 0 in the … See more
Despite the EFE as written containing the inverse of the metric tensor, they can be arranged in a form that contains the metric tensor in … See more
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