I'm trying to study an introduction to topos quantum theory but I keep finding this concept that I don't understand fully. In "A Topos Perspective on the Kochen-Specker Theorem: I. Quantum States as Generalized Valuations" by Isham e Butterfield it's called "spectral algebra $W_{A}$, where $A$ is a bounded operator with discrete spectra, some boolean algebra obtained from the set of projectors that are in the spectral decomposition of $A$. Tell me if you know something about that, please.
2026-03-29 15:32:18.1774798338
What does exactly mean "the spectral algebra $W_{A}$"?
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