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The Hubble time is defined as t​H = 1/H​0. Consider a Closed model for the Universe...

The Hubble time is defined as t​H = 1/H​0. Consider a Closed model for the Universe without a cosmological constant, so that the mass density parameter is Ω​M > 1. Give an expression for the age t​max (in units of t​H) of a Closed model at the time when the Universe has reached its maximum size, is no longer expanding, and is about to start contracting.

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