Does GR really post-dict the big bang?

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SUMMARY

The discussion centers on the relationship between General Relativity (GR) and the theoretical framework of the big bang. It confirms that the Einstein field equations have specific solutions, notably the Friedmann–Lemaître–Robertson–Walker (FLRW) metric, which describes the big bang. The FLRW metric simplifies to the Friedmann equations, which are ordinary differential equations that provide insights into the dynamics of an expanding universe. This establishes a clear mathematical foundation for understanding the big bang within the context of GR.

PREREQUISITES
  • Understanding of General Relativity (GR) principles
  • Familiarity with Einstein field equations
  • Knowledge of Friedmann–Lemaître–Robertson–Walker (FLRW) metric
  • Basic differential equations
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  • Study the Friedmann equations in detail
  • Explore the implications of the FLRW metric on cosmology
  • Investigate the mathematical derivation of the Einstein field equations
  • Learn about the role of singularities in cosmological models
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Physicists, cosmologists, and students of theoretical physics interested in the mathematical foundations of the big bang theory and its implications in the framework of General Relativity.

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Do the GR tensor equations have specific solutions that post-dict the big bang? I have seen references to GR providing a theoretical basis for the big bang. Exactly what is the nature of this theoretical basis? If the mathematics for this is too complex for posting on this forum, I would appreciate a link that would provide more information about this. Thanks in advance.
 
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Yes, there is a solution to the Einstein field equations that describes the big-bang. It is called the Friedmann–Lemaître–Robertson–Walker metric, and it's not really that complicated. Here's a link to get started. It reduces to a set of simple ordinary differential equations called the Friedmann equations.
 
Thank you. That's very helpful.
 

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