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15
Math.TechQA.Club
2018-03-15 17:51:16
75
Views
Proving if $\varphi(c) \in \Sigma$ then $\exists x \, \varphi(x) \in \Sigma$ for a maximal consistent set
Published on
15 Mar 2018 - 17:51
#logic
#first-order-logic
#quantifiers
#natural-deduction
917
Views
Is this proof correct? (natural deduction)
Published on
17 Mar 2026 - 21:10
#logic
#propositional-calculus
#proof-theory
#natural-deduction
#formal-proofs
560
Views
Inference Proof for Biconditional
Published on
22 Mar 2026 - 14:15
#logic
#propositional-calculus
#proof-theory
#natural-deduction
#formal-proofs
577
Views
Fitch Natural Deduction proof problem
Published on
17 Mar 2026 - 2:15
#logic
#propositional-calculus
#proof-theory
#natural-deduction
#formal-proofs
377
Views
Proving this sequent using natural deduction
Published on
22 Mar 2026 - 10:45
#logic
#first-order-logic
#predicate-logic
#quantifiers
#natural-deduction
85
Views
Proving complicated predicate calculus sequent
Published on
22 Mar 2026 - 18:46
#logic
#first-order-logic
#predicate-logic
#quantifiers
#natural-deduction
1.8k
Views
Proof for Negation of existential quantifier : Formal Deduction && Predicate Logic
Published on
12 Apr 2018 - 19:39
#logic
#first-order-logic
#predicate-logic
#quantifiers
#natural-deduction
154
Views
Variable Condition in Typed Lambda Calculus
Published on
22 Mar 2026 - 14:31
#logic
#natural-deduction
#lambda-calculus
#type-theory
107
Views
Natural Deduction - 'monotone' property of sequent
Published on
22 Mar 2026 - 14:05
#logic
#propositional-calculus
#proof-theory
#natural-deduction
173
Views
Logical Deduction an example
Published on
22 Mar 2026 - 0:50
#logic
#natural-deduction
79
Views
Prove in natural deduction
Published on
21 Mar 2026 - 22:23
#logic
#predicate-logic
#natural-deduction
531
Views
Deduction of "Disjunction elimination"
Published on
22 Mar 2026 - 0:52
#logic
#propositional-calculus
#natural-deduction
#formal-proofs
140
Views
Construction of a derivation when proving equivalence of a logical formula.
Published on
29 Apr 2018 - 18:58
#logic
#propositional-calculus
#natural-deduction
380
Views
What's the intuition behind using Law of Excluded Middle in Natural Deduction?
Published on
23 May 2018 - 16:18
#proof-verification
#logic
#first-order-logic
#natural-deduction
648
Views
Prove that double negation elimination is a derivated rule
Published on
26 May 2018 - 21:58
#logic
#proof-explanation
#propositional-calculus
#natural-deduction
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