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19 - Letters to David Meyer

Published online by Cambridge University Press:  05 October 2012

Christopher A. Fuchs
Affiliation:
University of Massachusetts, Boston
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Summary

February 1999, “From Gleason to Pitowsky”

You'll note that I've forwarded you three emails from my correspondence with Itamar. [See note to Pitowsky dated 13 October 1998 (Other Letters).] I'd be keen to hear any further thoughts you might have on Gleason or Kochen and Specker. My email is always an open door when it comes to better understanding the quantum …

May 1999, “SD and KS” and “Even More Relevant”

How about we plan on my dropping by sometime during the week of May 24–28. You guys choose the exact dates (either one or two nights, as you said). I'll probably bring my wife and little girl down with me. They'll drop me off to play with you, and go off to play a little on their own.

I have a question about your rational-point anti-KS result. I'm starting to wonder how robust the idea is. The way you pose the problem is to consider the points on the sphere with rational cartesian coordinates. But are you sure that nothing changes under rather natural coordinate changes? For instance, imagine working in spherical coordinates for vectors on the unit sphere in R3. If we restrict ourselves to rational angles θ and φ, the cartesian coordinates so generated will almost always be irrational. And this discrete set of vectors is not just a rigid rotation of the ones you consider.

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Chapter
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Coming of Age With Quantum Information
Notes on a Paulian Idea
, pp. 274 - 275
Publisher: Cambridge University Press
Print publication year: 2011

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