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Use standard natural deduction rules and names #144

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rzach opened this Issue Jul 13, 2017 · 2 comments

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rzach commented Jul 13, 2017

The natural deduction chapter uses nonstandard rules. Replace them by Prawitz rules, ie intuitionisim and classical absurdity rules, A, -A |- \lfalse is -Elim not \lfalse Intro.

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rzach Jul 13, 2017

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@nicolewyatt do you want this for Fall (or at all)?

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rzach commented Jul 13, 2017

@nicolewyatt do you want this for Fall (or at all)?

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I always do sequent calculus in 379 so not needed for me ever.

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nicolewyatt commented Jul 13, 2017

I always do sequent calculus in 379 so not needed for me ever.

rzach added a commit that referenced this issue Jul 17, 2017

rzach added a commit that referenced this issue Aug 8, 2017

completeness via complete sets and clearer more detailed proofs; stan…
…dard sequent calculus w/ sequences; better soundness proof for LK; standard natural deduction rules (fixes issues #38, #74, #144, #145, #147) (#143)

completeness via complete sets and clearer more detailed proofs; standard sequent calculus w/ sequences; better soundness proof for LK; standard natural deduction rules (fixes issues #38, #74, #144, #145, #147)

@rzach rzach closed this Aug 8, 2017

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