Abstract
A partial solution to Ono’s problem P54 is given. Here Ono’s problem P54 is whether Harrop disjunction property is equivalent to disjunction property or not in intermediate predicate logics. As an application of this result it is shown that some intermediate predicate logics satisfy Harrop disjunction property.
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The author would like to thank the referee for several suggestions.
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Ishii, K. On Harrop disjunction property in intermediate predicate logics. Arch. Math. Logic 63, 317–324 (2024). https://doi.org/10.1007/s00153-023-00895-1
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DOI: https://doi.org/10.1007/s00153-023-00895-1