Tag: proof theory

Finitary Arithmetic

Finitary arithmetic is a mathematical approach that emphasizes constructive methods, avoiding infinite…

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Exportation in Logic

Exportation is a logical principle that rewrites (P AND Q) -> R…

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Existential Introduction

A rule of inference in logic that allows the introduction of an…

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Double Negation Introduction

The principle of double negation introduction states that for any proposition P,…

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Disjunction Property

The disjunction property in intuitionistic logic asserts that if a statement P…

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Discharge in Logical Derivation

Discharge is the act of eliminating an assumption within a logical derivation.…

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Derivable Rule in Logic

A derivable rule is a logical rule that can be derived from…

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Deductive Validity

Deductive validity ensures that if premises are true, the conclusion *must* be…

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Deduction Theorem

The deduction theorem states that if a statement can be derived from…

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Cut Elimination

A fundamental procedure in proof theory that systematically removes 'cuts' from a…

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