(adsbygoogle = window.adsbygoogle || []).push({}); {Reference: Wikipedia's Friedmann-Lemaitre-Robertson-Walker (FLRW) Metric article)}

The FLRW (1935) mathematical model of the universe is the one most used by cosmologists. It is differentiable, which means it is based on sound, consistent, mathematical formulations. (The Lambda-CDM model is further developed, but the FLRW model is adequate for this post.) Included in the FLRW mathematics are some of Einstein's field equations from general relativity. Some of the features of the FLRW model are that it is finite, unbounded, expandable, and free of topology defects.

I understand that the model has no borders and can be infinite if needed, and that this is required by its mathematics. What I am curious about is the attitude of cosmologists toward the ongoing increment of the expanding universe. Is it a part of cosmology, or is it not? If it is, then what is the consensus view of its nature?

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# I Is the increment of the expanding universe part of cosmology

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