Beazer, R.; Macnab, D. S. Modal extensions of Heyting algebras. (English) Zbl 0436.06010 Colloq. Math. 41, 1-12 (1979). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 17 Documents MSC: 06D20 Heyting algebras (lattice-theoretic aspects) 06D25 Post algebras (lattice-theoretic aspects) 06D30 De Morgan algebras, Łukasiewicz algebras (lattice-theoretic aspects) Keywords:modal extension; modal operators on a Heyting algebra; complete Heyting algebra; Post algebra; Lukasiewicz algebra; Boolean algebra; dense element PDFBibTeX XMLCite \textit{R. Beazer} and \textit{D. S. Macnab}, Colloq. Math. 41, 1--12 (1979; Zbl 0436.06010) Full Text: DOI