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The tensor encoding local energy density, momentum density, stresses, and fluxes that sources spacetime curvature.
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Stress–energy is represented by a symmetric tensor field.
A mathematical concept supplies part of the formal language, state space, representation, or analytic machinery used by a scientific or mathematical-physics concept. The source is the mathematical predecessor; this does not claim that physical content follows from mathematics alone.
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The stress–energy tensor appears on the matter side of Einstein’s equation.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
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For an FLRW geometry, the stress–energy tensor—usually modeled as a homogeneous isotropic fluid—provides the density and pressure terms in the Friedmann equations.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
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