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20232026
most citedClosure algebras of depth two with extremal relations: Their frames, logics, and structural completeness

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math.LO2026

Ultracontact algebras and stack systems

Luca Carai, Ivo Düntsch, Rafał Gruszczyński +1

We study the class of structures that, in a way, generalize various approaches to the contact relation on Boolean algebras.