B&D Companion Notebooks
Interactive Pluto notebooks following
Boxes and Diamonds (Zach 2025). Each notebook makes the textbook's
definitions and exercises live — modify a formula or model and see all results
update immediately. Use Binder
to run them interactively, or browse the static versions below.
Chapters
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Ch 0
Propositional Logic
Connectives, implications, tautologies, and the limits of propositional reasoning
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Ch 1
Syntax and Semantics
Modal formulas, Kripke models, truth at a world, satisfiability and validity
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Ch 2
Frame Definability
Reflexivity, symmetry, transitivity, seriality, euclideanness, and the T/B/4/D/5 schemas
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Ch 3
Axiomatic Derivations
Hilbert-style proof systems, modal axioms, substitution, and derivability
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Ch 4
Completeness
Canonical models, the Truth Lemma, Lindenbaum's Lemma, and completeness of K
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Ch 5
Filtrations and Decidability
Filtrations, the finite model property, and decidability of modal logics
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Ch 6
Modal Tableaux
Prefixed signed tableaux, automated proof search, consistency checking
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Ch 14
Temporal Logics
Always (𝐆), eventually (𝐅), historically (𝐇), previously (𝐏); linear frames and temporal validity
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Ch 15
Epistemic Logics
Knowledge operators Ka, S5 axioms, multi-agent knowledge, public announcements
Extension
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Ext
Combined Deontic–Temporal Logic
Obligations over time; the KDt system; combining deontic seriality with temporal operators
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