On some proof theoretical properties of the modal logic GL (Q798649)

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scientific article; zbMATH DE number 3871326
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On some proof theoretical properties of the modal logic GL
scientific article; zbMATH DE number 3871326

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    On some proof theoretical properties of the modal logic GL (English)
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    1983
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    GL is the propositional modal logic complete under the interpretation of necessity as provability in first-order arithmetic. The cut elimination proof for GL given by \textit{D. Leivant} [J. Symb. Logic 46, 531--538 (1981; Zbl 0464.03019)] contained a gap repaired by \textit{S. Valentini} [J. Philos. Logic 12, 471--476 (1983; Zbl 0535.03031)]. The author presents another cut elimination proof.
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    GL
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    propositional modal logic
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    cut elimination
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