Simultaneity, Convention, and Gauge Freedom.
As is well know from Einstein (1905) the choice of a criterion for distant simultaneity is equivalent to stipulating one-way speeds for the transit of light. It is shown that any choice of non-standard synchrony is equivalent to a Lorentz local time boost. From this and considerations from the hole argument, it follows that there is a non-trivial sense in which distant simultaneity is conventional, at least to the extent that the “gauge freedom” arising in the hole argument is non-trivial.
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Simultaneity, Convention, and Gauge Freedom. (deposited 16 Sep 2011 13:38)
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