Table of contents : Title Page Corrections and Emendations Chapter I: Sets 1 Sets and elements 2 Subsets of a given set 3 Countable and uncountable sets 4 Cardinal number 5 The paradoxes 6 Axiomatic set theory Chapter II: Logic 7. The propositional calculus (model theory): validity 8. The propositional calculus (model theory): valid consequence 9. The propositional calculus (proof theory): provability and decidability 10. The predicate calculus (model theory): validity 11. The predicate calculus (model theory): valid consequence 12. The predicate calculus (proof theory): provability and deducibility Chapter III: Mathematical Foundations 13. Axiomatic thinking vs. intuitive thinking in mathematics 14. Formal systems, metamathematics 15. Turing machines, Church's thesis 16. Church's theorem 17. Gödel's theorem 18. Gödel's theorem and Skolem models (end)