Useful Links
1. Introduction to Mathematical Logic
2. Propositional Logic
3. First-Order Logic
4. Model Theory
5. Computability Theory
6. Incompleteness Theorems
7. Axiomatic Set Theory
8. Proof Theory
9. Modal Logic
10. Intuitionistic Logic
11. Higher-Order Logic
  1. Mathematics

Mathematical Logic

1. Introduction to Mathematical Logic
2. Propositional Logic
3. First-Order Logic
4. Model Theory
5. Computability Theory
6. Incompleteness Theorems
7. Axiomatic Set Theory
8. Proof Theory
9. Modal Logic
10. Intuitionistic Logic
11. Higher-Order Logic
  1. Intuitionistic Logic
    1. Philosophical Foundations
      1. Constructive Mathematics
        1. Rejection of Law of Excluded Middle
          1. Brouwer's Intuitionism
          2. Syntax of Intuitionistic Logic
            1. Logical Connectives
              1. Quantifiers
                1. Formation Rules
                2. Semantics of Intuitionistic Logic
                  1. Brouwer-Heyting-Kolmogorov Interpretation
                    1. Kripke Semantics for Intuitionistic Logic
                      1. Topological Semantics
                      2. Proof Theory of Intuitionistic Logic
                        1. Natural Deduction for Intuitionistic Logic
                          1. Sequent Calculus for Intuitionistic Logic
                            1. Cut-Elimination
                            2. Relationship to Classical Logic
                              1. Double Negation Translation
                                1. Gödel-Gentzen Translation
                                  1. Embedding Results

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