On 1/18/2020 10:56 PM, Alan Grayson wrote:
I don't claim anything except that GR has solutions for a cosmos
in which space is flat and, in that solution, space is infinite
and empirically it appears that space is flat.
*Measurements don't establish it's flat, as I previously argued. And,
as you previously stated, the sign of k, the parameter in GR
intimately associated with curvature, is folded into the initial
conditions. But since the initial conditions are really unknown, or
are speculative, you can assume initial conditions which satisfy your
bias, in this case FLAT. AG *
No. It's not an assumption. Empirically the universe appears flat,
which (assuming the FLRW model) implies it was always flat. It is not
a question of assuming an initial condition, it is inferring the initial
condition from present measurements of k.
Brent
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