Formal system

External links

• Experiencing systems as a puzzle game - very good! http://incredible.pm/

Wikipedia

• Formal_system, Formal_language, Formal_grammar (Abstract_syntax_tree, Backus–Naur_form)
• Rewriting and Substitution, Explicit_substitution
• Chomsky_hierarchy

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• Boolean_algebra (De Morgan's laws, Karnaugh_map)
• Propositional_calculus, Second-order_propositional_logic (Second-order_logic), Higher-order_logic

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• Intuitionistic_logic, Intuitionistic_type_theory, Curry–Howard_correspondence
• Untyped_lambda_calculus, Simply_typed_lambda_calculus, Typed_lambda_calculus, System_F
• Evaluation_strategy, De_Bruijn_index (or better alternative)
• Lambda_cube

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• Foundations_of_mathematics, Category_theory, Corecursion
• Categorical_logic Bicartesian_closed_category (Homotopy type theory, Lawvere theories)

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• Calculus_of_constructions, Formal_verification, Automated_theorem_proving, Symbolic_computation, Computer_algebra_system