Curvature tensors {Ricci curvature tensor} can describe space volume changes, which is local curvature caused by local matter.
Perhaps, at one second after universe origin, thermal variations in Ricci curvature tensor formed particles and black holes.
Physical Sciences>Physics>Relativity>General Relativity>Equations>Tensor
5-Physics-Relativity-General Relativity-Equations-Tensor
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Date Modified: 2022.0224