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We investigate the arithmetical completeness theorems of some extensions of Fitting, Marek, and Truszczy\'nski's pure logic of necessitation N. For m, n, let N^+ A₌, ₍, which was introduced by Kurahashi and Sato, be the logic obtained from N by adding the axiom scheme ⁿ A ᵐ A and the rule A A. In this paper, among other things, we prove that for each m, n 1, the logic N^+ A₌, ₍ becomes a provability logic.
Haruka Kogure (Mon,) studied this question.
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