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Results tagged with proof-theory
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user 3554
For question in Proof Theory, where "proofs" themselves are the object of mathematical investigation. It is not to be used to request a proof of some result.
14
votes
6
answers
5k
views
Do you know any good introductory resource on sequent calculus?
I'm looking for a good introductory resource on sequent calculus suitable for someone who has studied natural deduction before. Books and online resources are both OK, as long as each rule of inferenc …
- 737
1
vote
2
answers
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What does the disjunction elimination rule say?
I read about two different versions of the disjunction elimination rule.
The first version (http://www.fecundity.com/logic/) says that:
if $\Sigma\vdash\phi_0\lor\phi_1$ and $\Sigma\vdash\lnot\phi_ …
- 737