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Logic and Inferences
Logic and Inferences

Predicate Logic
Predicate Logic

.pdf
.pdf

What Classical Connectives Mean
What Classical Connectives Mean

Verification and Specification of Concurrent Programs
Verification and Specification of Concurrent Programs

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On The Expressive Power of Three-Valued and Four

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Algebraizing Hybrid Logic - Institute for Logic, Language and

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A Resolution-Based Proof Method for Temporal Logics of

Chapter 2, Logic
Chapter 2, Logic

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Elementary Logic

... The meaning of ⊥ is always F (false). There is an implicit inductive definition in the table. We shall try to make this precise. ...
Quantified Multimodal Logics in Simple Type Theory
Quantified Multimodal Logics in Simple Type Theory

On Gabbay`s temporal fixed point operator
On Gabbay`s temporal fixed point operator

Structural Multi-type Sequent Calculus for Inquisitive Logic
Structural Multi-type Sequent Calculus for Inquisitive Logic

Formal logic
Formal logic

... If I V (ϕ) = 1 then it is said that V is a model of ϕ, or that V satisfies ϕ; it is a “world” in which ϕ is true. A formula is said to be valid if it is true under all circumstances, that is, if every valuation is a model of ϕ: ϕ is valid if I V (ϕ) = 1 for all valuations V . For instance, it is ea ...
Completeness through Flatness in Two
Completeness through Flatness in Two

Games, equilibrium semantics and many
Games, equilibrium semantics and many

... E.g. proportionality quantifiers modeling about half, few, many. These can be reduced to Π within Giles’s game! See F/Roschger: Randomized Game Semantics for Semi-Fuzzy Quantifiers, IGPL Journal, to appear Fine, but was does this have to do with IF logic? Answer: Πx F (x) ≈ ∀x/{x, . . .}F (x) ⇔ ∃x/{ ...
An Unsolvable Problem of Elementary Number Theory Alonzo
An Unsolvable Problem of Elementary Number Theory Alonzo

“Sometimes” and “Not Never” Revisited
“Sometimes” and “Not Never” Revisited

Understanding Intuitionism - the Princeton University Mathematics
Understanding Intuitionism - the Princeton University Mathematics

A Combinatorial Characterization of Resolution Width
A Combinatorial Characterization of Resolution Width

Chapter 2 Propositional Logic
Chapter 2 Propositional Logic

... The world logic refers to the use and study of valid reasoning. Logic contains rules and techniques to formalize statements, to make them precise. Logic is studied by philosophers, mathematicians and computer scientists. Logic appears in different areas of computer science, such as programming, circ ...
Herbrand Theorem, Equality, and Compactness
Herbrand Theorem, Equality, and Compactness

CHAPTER 9 Two Proofs of Completeness Theorem 1 Classical
CHAPTER 9 Two Proofs of Completeness Theorem 1 Classical

... is also called a Soundness Theorem, or soundness part of the Completeness Theorem. The second implication says: if a formula is a tautology then it has a proof. This alone is often called a Completeness Theorem. In our case, we call it a completeness part of the Completeness Theorem. The proof of th ...
Chapter 9 Propositional Logic Completeness Theorem
Chapter 9 Propositional Logic Completeness Theorem

Quantitative Temporal Logics: PSPACE and below - FB3
Quantitative Temporal Logics: PSPACE and below - FB3

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Propositional formula

In propositional logic, a propositional formula is a type of syntactic formula which is well formed and has a truth value. If the values of all variables in a propositional formula are given, it determines a unique truth value. A propositional formula may also be called a propositional expression, a sentence, or a sentential formula.A propositional formula is constructed from simple propositions, such as ""five is greater than three"" or propositional variables such as P and Q, using connectives such as NOT, AND, OR, and IMPLIES; for example:(P AND NOT Q) IMPLIES (P OR Q).In mathematics, a propositional formula is often more briefly referred to as a ""proposition"", but, more precisely, a propositional formula is not a proposition but a formal expression that denotes a proposition, a formal object under discussion, just like an expression such as ""x + y"" is not a value, but denotes a value. In some contexts, maintaining the distinction may be of importance.
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