Abstract
It is shown that every effect algebra can be represented as a pasting of a systemwhere each element is the range of an unsharp observable. To describe the rangeof an unsharp observable algebraically, the notion of a “para-Booleanquasi-effect algebra” is introduced. Some intrinsic compatibility conditions ensuringcommensurability of effects are studied.
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Cattaneo, G., Dalla Chiara, M.L., Giuntini, R. et al. Effect Algebras and Para-Boolean Manifolds. International Journal of Theoretical Physics 39, 551–564 (2000). https://doi.org/10.1023/A:1003621300998
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DOI: https://doi.org/10.1023/A:1003621300998