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* Start talking about cut elimination.David A. Madore2023-12-111-0/+79
* Equivalence of sequent calculus with natural deduction.David A. Madore2023-12-111-0/+55
* Sequent calculus: better discuss structural rules.David A. Madore2023-12-111-0/+38
* Make the fix less confusing.David A. Madore2023-12-111-6/+3
* Fix a mistake: contraction rule cannot be dispensed with.David A. Madore2023-12-091-10/+7
* Fix various mistakes noted during lecture on 2023-12-08.David A. Madore2023-12-081-9/+12
* Thinko.David A. Madore2023-12-051-1/+1
* Various minor changes (upon re-reading).David A. Madore2023-12-051-17/+28
* Examples of sequent calculus proofs.David A. Madore2023-12-041-3/+74
* The rules of sequent calculus.David A. Madore2023-12-041-0/+84
* Functoriality of connectors and of logical formulae.David A. Madore2023-12-041-24/+123
* Positive and negative occurrences.David A. Madore2023-12-041-0/+43
* A start of polymorphism, and substitution for type/prop variables.David A. Madore2023-12-041-2/+35
* Comments on negation and double negation.David A. Madore2023-12-041-0/+40
* Curry-Howard: a recapitulation.David A. Madore2023-12-041-4/+47
* Various minor changes or additions.David A. Madore2023-12-041-1/+21
* More discussion of the logical connectors.David A. Madore2023-12-041-4/+53
* Non-uniqueness of proofs.David A. Madore2023-12-031-1/+57
* Various examples of Curry-Howard.David A. Madore2023-12-031-1/+81
* Curry-Howard correspondence for true and false.David A. Madore2023-12-031-1/+32
* An example of Curry-Howard with disjunction.David A. Madore2023-12-031-0/+41
* Remarks on products and sums.David A. Madore2023-12-031-2/+44
* Curry-Howard correspondence for disjunction.David A. Madore2023-12-031-0/+31
* An example of Curry-Howard with implication.David A. Madore2023-12-031-0/+31
* An example of Curry-Howard with conjunction.David A. Madore2023-12-031-4/+74
* Curry-Howard correspondence for implication alone.David A. Madore2023-12-031-0/+44
* Brouwer-Heyting-Kolmogorov interpretation of logical connectives.David A. Madore2023-12-031-1/+28
* A few more important tautologies.David A. Madore2023-12-031-1/+5
* Various informal explanations of constructive math / intuitionism.David A. Madore2023-12-021-0/+142
* Classical logic.David A. Madore2023-12-021-3/+71
* Proof of negation vs reduction ad absurdum.David A. Madore2023-12-021-0/+54
* Examples of non-tautologies.David A. Madore2023-12-021-3/+37
* Some important tautologies.David A. Madore2023-12-021-0/+58
* Yet another presentation of natural deduction proofs (flag presentation).David A. Madore2023-12-021-2/+38
* Another presentation of natural deduction proofs.David A. Madore2023-12-021-2/+49
* An exercise on a possible representation of pairs in functional programming l...David A. Madore2023-12-011-5/+146
* Another exercise on various "loopy" reductions.David A. Madore2023-12-011-1/+120
* Give two examples of natural deduction proofs (written in sequent style).David A. Madore2023-11-301-0/+41
* Some exercises on the untyped lambda-calculus.David A. Madore2023-11-301-0/+286
* Minor fixes.David A. Madore2023-11-301-3/+3
* Much longer explanation of the Y (and also Z) combinator.David A. Madore2023-11-281-5/+139
* Highlight discharged hypotheses in natural deduction presentation.David A. Madore2023-11-281-3/+7
* Fix various small mistakes or unclear points.David A. Madore2023-11-281-9/+8
* Alternative notation for multiple lambdas.David A. Madore2023-11-281-2/+3
* Avoid speaking of type "constructors", a word which might cause confusion.David A. Madore2023-11-281-4/+4
* Typo.David A. Madore2023-11-281-1/+1
* Rules of inuitionistic propositional calculus in natural deduction style.David A. Madore2023-11-271-0/+39
* Syntax of propositional calculus.David A. Madore2023-11-271-2/+39
* Quick overview of intuitionistic propositional calculus.David A. Madore2023-11-271-0/+38
* A (humorous) graphical representation of the Curry-Howard correspondence.David A. Madore2023-11-243-4/+27
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