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• CommentRowNumber1.
• CommentAuthorUrs
• CommentTimeJan 7th 2014

created an entry beable

(Surprisingly, this keyword does not have a Wikipedia entry…)

• CommentRowNumber2.
• CommentAuthorTodd_Trimble
• CommentTimeJan 7th 2014

Ugh. Not an attractive English word, IMHO.

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeJan 7th 2014

But I can’t help it, that’s what it’s called…

• CommentRowNumber4.
• CommentAuthorTodd_Trimble
• CommentTimeJan 7th 2014

I know you can’t help it. No, I’d leave the spelling alone (no hyphen unless that’s what appears in the literature); it’s clear from the context how it should be pronounced. In fact, please feel free to ignore my last comment entirely! :-)

• CommentRowNumber5.
• CommentAuthorspitters
• CommentTimeJan 7th 2014

I added two later references and a remark on how this connects to Bohr toposes.

• CommentRowNumber6.
• CommentAuthorUrs
• CommentTimeJan 7th 2014
• (edited Jan 8th 2014)

Thanks.

Two questions:

I have trouble locating the paragraph where Bell explicitly talks about mutually commuting operators, classical contexts. Where is it?

Second, there seems to be some transmutation of the term in the course of its history which is not fully clear to me. First it’s just a new word meant to help to talk about standard quantum mechanics, but before long people use it as if giving a new interpretation or something of quantum mechanics. Do you oversee this? We should comment on that in the entry.

• CommentRowNumber7.
• CommentAuthorspitters
• CommentTimeJan 8th 2014

I was taking the Halvorson Clifton definition of beable subalgebra (p9) and then focussing on the important special case of the definite algebra $D_\rho$ for a state $\rho$. This is the subalgebra on which $\rho$ is dispersion free. Hence, for each commutative subalgebras of $C\subset D_\rho$, a choice of an element of its spectrum (values). These choices are compatible. Hence, we obtain a local section.

• CommentRowNumber8.
• CommentAuthorUrs
• CommentTimeJan 8th 2014

Okay, thanks. By the way, I don’t doubt that you are right, but when reading your message I noticed that I had trouble finding the actual definitions in Bell’s articles (or elsewhere).

• CommentRowNumber9.
• CommentAuthorspitters
• CommentTimeJan 9th 2014

Done.

We once had a plan to further explore these connections between beables and Bohr toposes, but never found the time.

• CommentRowNumber10.
• CommentAuthorTodd_Trimble
• CommentTimeJan 8th 2020

I tripped repeatedly over the grammar of the first sentence in the second paragraph, so I added two commas, mainly to clarify that “this” is in this instance a pronoun, not a determiner.