Question

Basic question about proofs with the goal $\exists x P(x)$

score 200 · Answer 1 · 2020-08-21 20:19:24

200

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Basic question about proofs with the goal $\exists x P(x)$

Published on 21 Aug 2020 - 20:19

score 146 · Answer 2 · 2020-08-24 16:59:16

146

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Quantifiable logic. Difference between $\forall y, \forall z(F(y,z) \implies Q(y)) $ and $\forall y, \exists z (F(y,z)\implies Q(y))$.

Published on 24 Aug 2020 - 16:59

score 117 · Answer 3 · 2020-08-24 23:24:52

117

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Is $P(a)$ logically equivalent to $\forall y [(y=a) \rightarrow P(y)]$?

Published on 24 Aug 2020 - 23:24

score 137 · Answer 4 · 2020-08-25 11:10:49

137

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Formal structure of a proof with the goal $\exists x P(x)$

Published on 25 Aug 2020 - 11:10

score 84 · Answer 5 · 2020-08-29 19:30:20

84

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Unsure if two expressions are logically equivalent

Published on 29 Aug 2020 - 19:30

score 1.3k · Answer 6 · 2020-08-30 18:10:30

1.3k

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Pulling universal quantifier out of parenthesis makes nonequivalent statement?

Published on 30 Aug 2020 - 18:10

score 62 · Answer 7 · 2020-08-30 22:40:46

62

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Understanding the concept of $P(u/v)$ in the context of First Order Logic.

Published on 30 Aug 2020 - 22:40

score 108 · Answer 8 · 2026-03-29 06:29:12

108

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Proving and disproving First Order Logic statements in $\mathbb{N}$.

Published on 29 Mar 2026 - 6:29

score 69 · Answer 9 · 2020-09-07 20:50:24

69

Views

How to understand quantifiers?

Published on 07 Sep 2020 - 20:50

score 55 · Answer 10 · 2020-09-08 11:45:43

55

Views

What is the difference between the two quantified expressions?

Published on 08 Sep 2020 - 11:45

score 499 · Answer 11 · 2020-09-08 14:34:45

499

Views

Quantifiers for multiple variables?

Published on 08 Sep 2020 - 14:34

score 53 · Answer 12 · 2020-09-09 23:44:57

53

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How to write a particular definition of irreducible numbers using quantifier notation.

Published on 09 Sep 2020 - 23:44

score 43 · Answer 13 · 2026-03-28 02:44:56

43

Views

Can the symbol $\forall$ be replaced by a noun or a verb of some sort?

Published on 28 Mar 2026 - 2:44

score 215 · Answer 14 · 2026-03-26 22:50:09

215

Views

Nested quantifiers and restrict domain

Published on 26 Mar 2026 - 22:50

score 162 · Answer 15 · 2026-03-29 06:30:27

162

Views

Logic justification for the use of "Let $y = ...$" in Existential proof.

Published on 29 Mar 2026 - 6:30

List Question

Basic question about proofs with the goal $\exists x P(x)$

Quantifiable logic. Difference between $\forall y, \forall z(F(y,z) \implies Q(y)) $ and $\forall y, \exists z (F(y,z)\implies Q(y))$.

Is $P(a)$ logically equivalent to $\forall y [(y=a) \rightarrow P(y)]$?

Formal structure of a proof with the goal $\exists x P(x)$

Unsure if two expressions are logically equivalent

Pulling universal quantifier out of parenthesis makes nonequivalent statement?

Understanding the concept of $P(u/v)$ in the context of First Order Logic.

Proving and disproving First Order Logic statements in $\mathbb{N}$.

How to understand quantifiers?

What is the difference between the two quantified expressions?

Quantifiers for multiple variables?

How to write a particular definition of irreducible numbers using quantifier notation.

Can the symbol $\forall$ be replaced by a noun or a verb of some sort?

Nested quantifiers and restrict domain

Logic justification for the use of "Let $y = ...$" in Existential proof.

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