Tag Archive for: stress-energy tensor

einstein field equations

Einstein Field Equations Explained: Structure, Solutions, Facts

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The Einstein Field Equations (EFE) are ten coupled, nonlinear differential equations that describe how matter and energy determine the curvature of spacetime.…
pressure is a source of gravity

Is Pressure A Source Of Gravity?

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In a previous series of articles, I posed the question "Does Gravity Gravitate?" and explained how, depending on how you interpreted the terms "gravity"…
electric potential

Deriving the Cosmic Fluid Equation from Energy Conservation

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Local energy conservation in general relativity (GR), expressed as ##{T^{0b}}_{;b}=0##, combines with the Friedmann-Lemaître-Robertson-Walker (FLRW) metric…
gravitate

Does Gravity Gravitate?

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 The title question of this article is one that often comes up in PF threads, and I would like to give my take on it. This will be the first…