Johnstone, P. T. Conditions related to De Morgan’s law. (English) Zbl 0445.03041 Applications of sheaves, Proc. Res. Symp., Durham 1977, Lect. Notes Math. 753, 479-491 (1979). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 22 Documents MSC: 03G30 Categorical logic, topoi 18B25 Topoi 54G05 Extremally disconnected spaces, \(F\)-spaces, etc. Keywords:extremely disconnected topological spaces; real number object; De Morgan law Citations:Zbl 0407.00001 PDF BibTeX XML OpenURL