No reason for entropy reversal
There is no good reason to suppose that the entropy gradient will reverse and entropy decrease during the collapsing phase of the cycle. It would be extremely improbable for this to happen for just the reasons Boltzmann outlined in his statistical explanation of the Second Law.
Immediately related elementsHow this works
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The Arrow of Time  »The Arrow of Time 
The physics of time »The physics of time
The thermodynamic arrow »The thermodynamic arrow
Why do we see an entropy gradient? »Why do we see an entropy gradient?
Asymmetric boundary condition »Asymmetric boundary condition
Past hypothesis »Past hypothesis
Why low entropy in the past? »Why low entropy in the past?
Cyclical universe »Cyclical universe
No reason for entropy reversal
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