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15
Math.TechQA.Club
2017-01-04 01:29:48
231
Views
How to prove this sequent in first-order logic?
Published on
04 Jan 2017 - 1:29
#logic
#first-order-logic
#natural-deduction
198
Views
Natural deduction proof of $p \rightarrow q \vdash \lnot(p \land \lnot q)$
Published on
12 Jan 2017 - 5:32
#natural-deduction
29
Views
Is this deduction using =elim rule correctly written?
Published on
16 Jan 2017 - 23:43
#logic
#natural-deduction
319
Views
Proving that every valid formula is derivable in natural deduction
Published on
25 Mar 2026 - 6:01
#logic
#natural-deduction
#metalogic
275
Views
Proving $\neg(p \to q)$ equivalent to $p \wedge \neg q$ using natural deduction
Published on
28 Jan 2017 - 21:27
#logic
#propositional-calculus
#natural-deduction
475
Views
How to solve this by natural deduction?
Published on
01 Feb 2017 - 14:43
#logic
#natural-deduction
89
Views
How to change a natural deduction proof into a tree proof
Published on
06 Feb 2017 - 11:24
#proof-verification
#natural-deduction
68
Views
Possible mistake in natural deduction
Published on
06 Feb 2017 - 12:39
#logic
#proof-verification
#natural-deduction
208
Views
Reductio ad absurdum, but just once
Published on
25 Mar 2026 - 17:37
#logic
#natural-deduction
#intuitionistic-logic
189
Views
discharge assumption in another branch
Published on
23 Feb 2026 - 10:15
#logic
#natural-deduction
#sequent-calculus
102
Views
What's the domain of f(x)?
Published on
09 Feb 2017 - 19:21
#calculus
#definition
#education
#big-list
#natural-deduction
404
Views
Need help with natural deduction logic proof (Chiswell/Hodge exercise 2.6.2d)
Published on
15 Feb 2017 - 4:38
#logic
#proof-writing
#natural-deduction
459
Views
Converting Fitch to Hilbert proof
Published on
04 Mar 2017 - 4:22
#logic
#natural-deduction
91
Views
Show that if $S \cup \{ \neg A\} \vdash B$ then $S \vdash A$
Published on
04 Mar 2017 - 18:37
#logic
#natural-deduction
1.9k
Views
Prove a Contraposition with natural deduction
Published on
05 Mar 2017 - 23:28
#discrete-mathematics
#elementary-set-theory
#logic
#proof-explanation
#natural-deduction
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