I have recently been reading Robert Goldblatt's fantastic book Topoi: The Categorial Analysis of Logic. Through chapters 6-8, Goldblatt produces a topos theoretic approach to zeroth order logic, where he generalises semantic valuations from boolean algebras. I am looking in particular for some other sources that talk about this topic. So far I have only been able to find resources on first order logic that are too advanced at my current stage.
2026-03-27 23:47:53.1774655273
Alternative sources for a topos theory description of zeroth order logic
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