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Bi-intuitionistic logic, also called Heyting-Brouwer logic, is a logic based on Heyting and Brouwerian algebras. A rough set logic based on regular double Stone algebra is regarded as the extension of bi-intuitionistic logic without intuitionistic and dual intuitionistic implication. In this paper, we discuss the aspects of bi-superintuitionistic logics which are stronger than bi-intuitionistic logic...
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