List questions from natural-deduction

Published on 19 Oct 2014 - 2:57

139

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Proving $\forall x (A\to B) \to(A \to \forall x B):x\notin \mbox{free}(A)$ in a Hilbert system where it is not an axiom

Published on 23 Oct 2014 - 23:23

402

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How to prove $p \vee q \vdash \neg(\neg p \wedge \neg q)$?

Published on 26 Oct 2014 - 20:42

72

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natural deduction on proving a claim

Published on 28 Oct 2014 - 3:21

195

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using the elimination rule in natural deduction

Published on 29 Oct 2014 - 23:46

800

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How can universal quantifier manipulation rules be made redundant by the generalization rule (metatheorem)?

Published on 30 Oct 2014 - 5:45

34.1k

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proof that p implies q entails not p or q

Published on 02 Nov 2014 - 17:00

69

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Need alternative proof to $ \exists x (k(x) \rightarrow t)$ entails $\forall x (k(x)) \rightarrow t $

Published on 02 Nov 2014 - 20:49

344

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Need Hints Prove "$((\neg \alpha \to \alpha) \to \alpha) $" Using Axiom 1,2,3 and MP and deduction theorem

Published on 12 Nov 2014 - 2:42

1.6k

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Motivation for natural deduction

Published on 20 Nov 2014 - 2:21

61

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Natural Deduction Propositional Logic

Published on 06 Dec 2014 - 2:26

1.2k

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How to prove this using natural deduction

Published on 29 Dec 2014 - 19:06

91

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Application of Modus Tollens rule in nested proof confusion

Published on 06 Oct 2019 - 5:43

295

Views

The principle of explosion as a rule of inference?

Published on 11 Oct 2019 - 15:43

87

Views

Proving ∀k{[P(1)⋀···⋀P(k)] → P(k + 1)} Natural Deduction

Published on 11 Oct 2019 - 16:09

List Question

Natural Deduction for sets

Proving $\forall x (A\to B) \to(A \to \forall x B):x\notin \mbox{free}(A)$ in a Hilbert system where it is not an axiom

How to prove $p \vee q \vdash \neg(\neg p \wedge \neg q)$?

natural deduction on proving a claim

using the elimination rule in natural deduction

How can universal quantifier manipulation rules be made redundant by the generalization rule (metatheorem)?

proof that p implies q entails not p or q

Need alternative proof to $ \exists x (k(x) \rightarrow t)$ entails $\forall x (k(x)) \rightarrow t $

Need Hints Prove "$((\neg \alpha \to \alpha) \to \alpha) $" Using Axiom 1,2,3 and MP and deduction theorem

Motivation for natural deduction

Natural Deduction Propositional Logic

How to prove this using natural deduction

Application of Modus Tollens rule in nested proof confusion

The principle of explosion as a rule of inference?

Proving ∀k{[P(1)⋀···⋀P(k)] → P(k + 1)} Natural Deduction

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