This course introduces the fundamental concepts, ideas and results of contemporary logic. It provides the basics of: propositional and first-order predicate logic; refutation trees; axiomatic and natural deduction calculi; model-theoretic semantics; Gödel's completeness theorem; computability (Turing machines); modal logic and Kripke’s semantics.
Course program
Part A – 30 hrs (detail)
Logical truths, logical consequence, consistency: intuitive notions.
Declarative sentences; material vs formal truths; arguments; deductively correct arguments; consistent sets of sentences.
Logical form.
Simple and complex declarative sentences; names, predicates, functors; modalities; open terms and open sentences; quantification; identity; numerical quantifiers; definite descriptions.
Propositional and predicate logic: basics.
Classical connectives and truth-tables; tautologies and correct inferences. Informal semantics of quantification.
Propositional and predicate logic: refutation trees.
Labelled trees; refutation trees; counterexample extraction. Elementarily valid formulas and inferences.
Classes, relations, functions, cardinality.
Classes, membership, inclusion; comprehension (abstraction); boolean operations; relations and functions; equinumerosity and cardinality; finite sets, denumerable sets; non-denumerable sets: Cantor’s theorems; set-theoretic paradoxes.
Traditional logic.
Categorical propositions; traditional square of oppositions; syllogisms.
Computability: basics.
Informal notions of algorithm, decidability, effective enumerability, computability; Post’s theorem; Turing machines; universal machines; Turing-Church thesis; undecidability of the halting problem and applications to logic. Generative grammars: Chomsky’s hierarchy.
Part B – 30 hrs (detail)
Elementary languages and model-theoretic semantics.
Inductive definitions and proofs by induction; elementary languages; correspondence theory of truth; semantic paradoxes. Tarskian semantics: structures and interpretations; satisfiability; logical consequence.
Syntax of elementary logic.
Informal notions of deduction; “Frege-Russell-Hilbert” vs “Gentzen” paradigms; the axiomatic calculus CQ; the calculus NK of natural deduction; equivalence between CQ and NK; structural properties of elementary deducibility.
Gödel’s completeness theorem for elementary logic.
Soundness, completeness, adequacy, compactness. Proof of the soundness theorem for NK. Proof of the completeness theorem for NK (saturated sets, Lindenbaum-Henkin lemma, canonical model) and corollaries: compactness, Löwenheim-Skolem. Limits to the expressiveness of elementary logic.
Incompleteness, undefinability, undecidability.
Elementary theories; first order Peano arithmetic; Gödel’s, Rosser’s, Tarski’s and Church’s theorems (hypothetic form); second-order logic.
Propositional modal logics and Kripke’s semantics. Modal and multimodal propositional languages; possibile-worlds semantics; main normal modal systems (K, D, T, S4, S5); their semantic and syntactic characterization; modal tableaux. Hints to: epistemic logic (distributed knowledge and common knowledge); dynamic logics.
Non classical logics (hints).
Intuitionistic logic: the “BHK” explanation of the meaning of intuitionistic logical constants; natural deduction and axiomatic calculi for intuitionistic logic; relations between classical and intuitionistic logic (Glivenko’s and Gödel-Gentzen’s theorems). Substructural logics (linear logic, Grišin’s logic, infinite valued Łukasiewicz’ logic).
Reading list:
Further information about the reading list will be given by the lecturer.
LINGUA FRANCESE PERFEZIONAMENTO
FRENCH (ADVANCE COURSE)
3 ECTS
YEAR
Second
LECTURER
Gabriela Cultrera
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ASSISTANT
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Annapaola Pioggiosi
E-MAIL
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gabriela.cultrera@unipv.it
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COURSE PROGRAM
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Management of enterprises
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Entrepreneurial logic
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Managerial logic
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Aims of enterprises
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Strategic management and operational management
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Grammar:
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Structure of the sentence
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Gallicisms
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The indefinite
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Expressions of time and space
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Adverbs
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Passive form
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Subjunctive
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Subordinates (time- space- cause- consequence – aim – concession-
condition – hypothesis)
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EDUCATIONAL AIM
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The purpose of the advanced course is to acquire a profound knowledge of spoken and written language in order to possess the grammatical and linguistic tools which makes possible the understanding and analysing of socio-economic topics in French.
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