FRW cosmologies between chaos and integrability
A.E. Motter, P.S. Letelier
TL;DR
This paper examines the dynamics of conformally coupled closed Friedmann-Robertson-Walker universes, clarifying the distinction between chaos and integrability, and addressing contradictions in previous research.
Contribution
It highlights that a nonchaotic system can still be nonintegrable, resolving apparent contradictions in cosmological chaos studies.
Findings
The universe model studied is nonchaotic.
The system is nonintegrable despite lacking chaos.
Clarifies the relationship between chaos and integrability in cosmology.
Abstract
A recent paper by Castagnino, Giacomini and Lara concludes that there is no chaos in a conformally coupled closed Friedmann-Robertson-Walker universe, which is in apparent contradiction with previous works. We point out that although nonchaotic the quoted system is nonintegrable.
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