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Vardanyan’s theorem for extensions of IΣ1
, 2005
"... Vardanyan’s theorem states that the set of PA-valid formulas of quantified modal logic is Π 0 2-complete. This result also holds for extensions of IΣ1 on the condition that inconsistency is not provable. key words: Predicate Provability Logic 1 ..."
Abstract
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Vardanyan’s theorem states that the set of PA-valid formulas of quantified modal logic is Π 0 2-complete. This result also holds for extensions of IΣ1 on the condition that inconsistency is not provable. key words: Predicate Provability Logic 1

