Re: Paper Series: Shift-symmetry in Einstein’s Universe

On Fri, 12 Jul 2024 9:29:34 +0000, Mikko wrote:

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On 2024-07-11 13:33:32 +0000, gharnagel said:

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On Thu, 11 Jul 2024 7:53:05 +0000, Mikko wrote:

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Perfect conservation of energy is not essential to relativity.

However,

relativity requires that if energy or momentum is conserved then

both

are.

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Our universe seems quite rigid about conservation of both.

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So it seems.
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The time direction symmetry is not an essential part of relativity.

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Our universe seems quite rigid about that, too.

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Not to the same extent. In particular, the second law of thermodynamics
is asymmetric.

Indeed.  I fight entropy every chance I get.  Unfortunately, there
always
seems to be more of it when I'm done.
Which brings up the Ekpyrotic universe theory.  When branes bash
together,
where does the creation energy come from?  I suspect the energy
difference
between the branes would decrease, reducing the probability of another
bash.
So how many can be sustained?  Or are there an infinite number of branes
so
it will take an infinite amount of time to equilibrate?