Question

Logic symbol $\forall$ before or after statement?

score 878 · Answer 1 · 2026-03-26 09:39:17

878

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Logic symbol $\forall$ before or after statement?

Published on 26 Mar 2026 - 9:39

score 276 · Answer 2 · 2018-11-04 12:23:44

276

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Concrete functions in logic

Published on 04 Nov 2018 - 12:23

score 37 · Answer 3 · 2018-11-04 19:44:32

37

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determine two interpretation for predicate logical formula

Published on 04 Nov 2018 - 19:44

score 355 · Answer 4 · 2026-03-25 04:43:45

355

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Find a natural deduction proof to show ∃x∃y (S(x,y) ∨ S(y,x)) ⊢ ∃x∃y S(x,y) by predicate logic.

Published on 25 Mar 2026 - 4:43

score 126 · Answer 5 · 2026-03-25 04:38:46

126

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Rewriting predicate sentences to logically equivalent statements that doesn't use the negation operator

Published on 25 Mar 2026 - 4:38

score 208 · Answer 6 · 2026-03-25 17:42:15

208

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What's the error in my proof of the statement: The product of two irrational numbers is irrational?

Published on 25 Mar 2026 - 17:42

score 1.2k · Answer 7 · 2026-03-25 02:57:23

1.2k

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Conversion to Clausal Form

Published on 25 Mar 2026 - 2:57

score 133 · Answer 8 · 2018-11-08 21:49:47

133

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formulas such that either "$\mathcal{M} \vDash \phi$, then $\mathcal{M} \vDash \psi$" or "$\mathcal{M} \vDash \phi \rightarrow \psi$"

Published on 08 Nov 2018 - 21:49

score 236 · Answer 9 · 2026-03-26 08:02:18

236

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What is the intuitive explanation of $\exists y \theta(x,y) \to \psi(x)$ is the same to $\forall y ( \theta(x,y) \to \psi(x) )$?

Published on 26 Mar 2026 - 8:02

score 363 · Answer 10 · 2026-03-24 23:51:34

363

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Formal proof of $\exists x (\exists y P(y) \rightarrow P(x))$ and $(\forall x \exists y R(x,y))\rightarrow (\forall y \exists x R(y,x))$

Published on 24 Mar 2026 - 23:51

score 118 · Answer 11 · 2026-03-25 08:05:35

118

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Predicate Logic Hilbert Proof

Published on 25 Mar 2026 - 8:05

score 27 · Answer 12 · 2018-11-10 15:12:09

27

Views

Find Interpretation for predicate logical formula

Published on 10 Nov 2018 - 15:12

score 59 · Answer 13 · 2026-03-25 20:11:57

59

Views

How does one formally show that bounded search with some property $R(a,x)$ is computable i.e. $\exists x \in \mathbf N (x < y \to R(a,x) )$?

Published on 25 Mar 2026 - 20:11

score 169 · Answer 14 · 2026-03-26 07:37:27

169

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Elementary substructure and existentially closed

Published on 26 Mar 2026 - 7:37

score 92 · Answer 15 · 2018-11-12 16:26:55

92

Views

What is the correct formalization of the statement: "Zero is the only neutral element in respect to addition"

Published on 12 Nov 2018 - 16:26

List Question

Logic symbol $\forall$ before or after statement?

Concrete functions in logic

determine two interpretation for predicate logical formula

Find a natural deduction proof to show ∃x∃y (S(x,y) ∨ S(y,x)) ⊢ ∃x∃y S(x,y) by predicate logic.

Rewriting predicate sentences to logically equivalent statements that doesn't use the negation operator

What's the error in my proof of the statement: The product of two irrational numbers is irrational?

Conversion to Clausal Form

formulas such that either "$\mathcal{M} \vDash \phi$, then $\mathcal{M} \vDash \psi$" or "$\mathcal{M} \vDash \phi \rightarrow \psi$"

What is the intuitive explanation of $\exists y \theta(x,y) \to \psi(x)$ is the same to $\forall y ( \theta(x,y) \to \psi(x) )$?

Formal proof of $\exists x (\exists y P(y) \rightarrow P(x))$ and $(\forall x \exists y R(x,y))\rightarrow (\forall y \exists x R(y,x))$

Predicate Logic Hilbert Proof

Find Interpretation for predicate logical formula

How does one formally show that bounded search with some property $R(a,x)$ is computable i.e. $\exists x \in \mathbf N (x < y \to R(a,x) )$?

Elementary substructure and existentially closed

What is the correct formalization of the statement: "Zero is the only neutral element in respect to addition"

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