A constructive valuation semantics for classical logic (Q1355127)
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scientific article; zbMATH DE number 1011146
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A constructive valuation semantics for classical logic |
scientific article; zbMATH DE number 1011146 |
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A constructive valuation semantics for classical logic (English)
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12 March 1998
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The goal is to find a witness for \(x\) from a classical proof of \(\exists xP(x)\) from Horn assumptions \(\forall y(Q_1(Y)\&\cdots\& Q_n(y)\to Q_{n+1}(y))\). For this fragment classical and intuitionistic provability coincide, and it is difficult to invent a classical proof which is not already intuitionistic (if obvious redundancies are deleted).
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fragment of classical logic
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classical provability
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intuitionistic provability
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