A topos perspective on the kochen-Specker theorem: IV. Interval valuations
| Abstract | We extend the topos-theoretic treatment given in previous papers of assigning values to quantities in quantum theory. In those papers, the main idea was to assign a sieve as a partial and contextual truth-value to a proposition that the value of a quantity lies in a certain set D of real numbers. Here we relate such sieve-valued valuations to valuations that assign to quantities subsets, rather than single elements, of their spectrum (we call these interval valuations). There are two main results. First, there is a natural correspondence between these two kinds of valuation, which uses the notion of a state's support for a quantity (Section 3). Second, if one starts with a more general notion of interval valuation, one sees that our interval valuations based on the notion of support (and correspondingly, our sieve-valued valuations) are a simple way to secure certain natural properties of valuations, such as monotonicity (Section 4). | |||||||||
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Ehud Hrushovski & Itamar Pitowsky (2004). Generalizations of Kochen and Specker's Theorem and the Effectiveness of Gleason's Theorem. Studies in History and Philosophy of Science Part B 35 (2):177-194.
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Gary M. Hardegree (2005). Completeness and Super-Valuations. Journal of Philosophical Logic 34 (1):81 - 95.
Alexander Bochman (1990). Concerted Instant-Interval Temporal Semantics. II. Temporal Valuations and Logics of Change. Notre Dame Journal of Formal Logic 31 (4):580-601.
Steven E. Edwards (1987). In Defense of Environmental Economics. Environmental Ethics 9 (1):73-85.
Bo Petersson (2011). Axel Hägerström and His Early Version of Error Theory. Theoria 77 (1):55-70.
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