On the frontier operator in Boolean algebras with a closure. (English) Zbl 0315.54006


54A05 Topological spaces and generalizations (closure spaces, etc.)
06E05 Structure theory of Boolean algebras
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[1] C. Kuratowski, ?Sur l’operation ? de l’Analysis Situs,? Fund. Math.,111, 182-199 (1922). · JFM 48.0210.04
[2] C. Kuratowski, Topology [Russian translation], Vol. 1, Mir, Moscow (1966). · Zbl 0158.40901
[3] Miron Zarycki, ?Quelques notions fondamentales de l’Analysis Situs on point de vue de l’Algèbre de la Logique,? Fund. Math.,9, 3-15 (1927). · JFM 53.0573.03
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