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Predicate logic: Someone visited the same mall every day in September

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#discrete-mathematics #propositional-calculus #predicate-logic
492
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everybody loves somebody in symbolic logic

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#logic #first-order-logic #predicate-logic
276
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How should be interpreted "(∀x)(∀y)(P(x) ∧ P(y) ⇒ x = y)"?

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#logic #propositional-calculus #predicate-logic #quantifiers
284
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Solve Logic puzzle using predicate logic and natural deduction

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#logic #propositional-calculus #predicate-logic #puzzle #natural-deduction
36
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need help with expressing uniqueness of elements that have the same property

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#discrete-mathematics #first-order-logic #predicate-logic
120
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Hasse diagram for poset including pairs

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#discrete-mathematics #predicate-logic #order-theory
432
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How do I actually use free variables in first order logic?

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#logic #first-order-logic #predicate-logic
75
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What's the difference between → and ∧ in this context?

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#predicate-logic #quantifiers
24
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Is $∀x((P(x)∨Q(x))) \to (∀x: (P(x) ∨ ∀x: Q(x)))$ correct.?

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#discrete-mathematics #predicate-logic
61
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can ∃x∀y and ∀y∃x sometime be equivalence?

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#predicate-logic #quantifiers
50
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Is ∃x(∀yP(x,y)) and ∃x∀yP(x,y) equivalence?

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#predicate-logic #quantifiers
155
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Expressing "Someone has visited every country in the world except Libya" using quantifiers

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#predicate-logic #quantifiers
59
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Are my three solutions for part (iii),(iv),and (v) correct? The question is below

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#discrete-mathematics #logic #predicate-logic
208
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Axioms of First Order Logic and ZFC Axioms

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#set-theory #first-order-logic #predicate-logic
52
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Trying to get my head around the "For exists" rule in predicate logic.

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#logic #predicate-logic #natural-deduction

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