On 09 May 2013, at 18:08, meekerdb wrote:

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On 5/9/2013 1:44 AM, Bruno Marchal wrote:I don't think that requires a wave function collapse, it'sexplained by Everett's MWI also, which is a kind of non-localhidden variable.Why non local? There is nothing non local in Everett's MWI.Sure it is. When you take the trace of the density matrix over theenvironment to get a set of orthogonal subspaces that's a non-local,mathematical operation.

`Local is about physical reality, not mathematical operation. The wave`

`describing the physical (physicists included) evolves`

`deterministically and locally. Non locality is in the (mathematical)`

`appearances.`

Bruno

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