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Show that there are only finitely many $\mathcal{L}$-structures with domain $D$

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#logic #predicate-logic
53
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how we can prove that argument $P_1,P_2,...,P_n $?

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#logic #propositional-calculus #predicate-logic #first-order-logic
250
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direct hint to showing a formula is valid?

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#logic #propositional-calculus #predicate-logic #first-order-logic
129
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Prove $\exists x(\varphi\wedge\psi)$ is $\underline{not}$ logically equivalent to $\exists x\varphi\wedge\exists x\psi$

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#logic #predicate-logic
54
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Constructing Logical Derivation

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#logic #predicate-logic #first-order-logic
168
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Predicate calculus (formal deduction vs resolution)

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#logic #predicate-logic
225
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Counterexample to Fraissé's Theorem for infinite signature

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#logic #model-theory #predicate-logic
229
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Predicate Calculus - Resolution

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#logic #predicate-logic
79
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Predicate Logic and Calculus

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#logic #predicate-logic
149
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How to prove $(\forall x,y\in\mathbb{Z})(5\nmid xy\to(5\nmid x\land 5\nmid y))$

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#discrete-mathematics #logic #predicate-logic #quantifiers
3.4k
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I need help understanding Frege's definition of number

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#logic #definition #predicate-logic #philosophy #foundations
190
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Logical Equivalence of Wffs in Sentence, Predicate Logic using Tables, Interpretations Resp.

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#logic #propositional-calculus #predicate-logic
63
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How do logicians notate a proposition that posits the instantiation of a property?

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#logic #predicate-logic
87
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Equivalence of $\forall x (L(p,x) \implies \neg L(s,x))$

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#logic #predicate-logic
120
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Why $ M\models \forall x ( \alpha \to \beta)$ Is False?

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#logic #propositional-calculus #predicate-logic #first-order-logic

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