# Boxes and Diamonds: An Open Introduction to Modal Logic

A textbook on modal and other intensional logics based on the Open Logic Project. It covers normal modal logics, relational semantics, axiomatic and tableaux proof systems, intuitionistic logic, and counterfactual conditionals. LINK

# Incompleteness and Computability: An Open Introduction to Gödel’s Theorems

Textbook on Gödel’s incompleteness theorems and computability theory, developed for Calgary’s Logic III course, based on the Open Logic Project. Covers recursive function theory, arithmetization of syntax, the first and second incompleteness theorem, models of arithmetic, second-order logic, and the lambda calculus. LINK

# Sets, Logic, Computation: An Open Introduction to Metalogic

Sets, Logic, Computation is an introductory textbook on metalogic. It covers naive set theory, first-order logic, sequent calculus and natural deduction, the completeness, compactness, and Löwenheim-Skolem theorems, Turing machines, and the undecidability of the halting problem and of first-order logic. The audience is undergraduate students with some background in formal logic, e.g., what is covered … Continue reading Sets, Logic, Computation: An Open Introduction to Metalogic

# forall x: Calgary. An Introduction to Formal Logic

forall x: Calgary is a full-featured textbook on formal logic. It covers key notions of logic such as consequence and validity of arguments, the syntax of truth-functional propositional logic TFL and truth-table semantics, the syntax of first-order (predicate) logic FOL with identity (first-order interpretations), translating (formalizing) English in TFL and FOL, and Fitch-style natural deduction … Continue reading forall x: Calgary. An Introduction to Formal Logic

# Rudolf Carnap: Early Writings

The Collected Works of Rudolf Carnap, Volume 1 Edited by A.W. Carus, Michael Friedman, Wolfgang Kienzler, Alan Richardson, and Sven Schlotter. With editorial assistance by Steve Awodey, Dirk Schlimm, and Richard Zach. Oxford: Oxford University Press, 2019. Publisher linkGoogle Books

# Fall 2019 edition of forall x:YYC is out

The Fall 2019 edition of forall x: Calgary is officially out. It’s available for download at forallx.openlogicproject.org and can be […]