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HandWiki. Congruence (General Relativity). Encyclopedia. Available online: https://encyclopedia.pub/entry/32806 (accessed on 13 October 2026).
HandWiki. Congruence (General Relativity). Encyclopedia. Available at: https://encyclopedia.pub/entry/32806. Accessed October 13, 2026.
HandWiki. "Congruence (General Relativity)" Encyclopedia, https://encyclopedia.pub/entry/32806 (accessed October 13, 2026).
HandWiki. (2022, November 04). Congruence (General Relativity). In Encyclopedia. https://encyclopedia.pub/entry/32806
HandWiki. "Congruence (General Relativity)." Encyclopedia. Web. 04 November, 2022.
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In general relativity, a congruence (more properly, a congruence of curves) is the set of integral curves of a (nowhere vanishing) vector field in a four-dimensional Lorentzian manifold which is interpreted physically as a model of spacetime. Often this manifold will be taken to be an exact or approximate solution to the Einstein field equation.
congruence
model
approximate solution
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