Morgado, JosĂ© A single axiom for closure operators of partially ordered sets. (English) Zbl 0295.06003 Gaz. Mat., Lisboa 26, No. 100, 57-58 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 06A15 Galois correspondences, closure operators (in relation to ordered sets) 06A06 Partial orders, general PDF BibTeX XML Cite \textit{J. Morgado}, Gaz. Mat., Lisb. 26, No. 100, 57--58 (1965; Zbl 0295.06003) OpenURL