The Einstein field equations describe the fundamental interaction of gravitation as a result of spacetime being curved by matter and energy: \[ R_{\mu\nu} - \frac{1}{2} R g_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8 \pi G}{c^4} T_{\mu\nu} \] where \( R_{\mu\nu} \) is the Ricci curvature tensor, \( R \) is the scalar curvature, \( g_{\mu\nu} \) is the metric tensor, \( \Lambda \) is the cosmological constant, \( G \) is the gravitational constant, and \( T_{\mu\nu} \) is the stress-energy tensor.
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