
Keywords: 54E05; 18A40; 54H10; 06E15; 03G05; 54D30; 54D10; (Pre)contact algebra; 2-(Pre)contact space; Stone space; Stone 2-space; (Stone) duality; C-semiregular spaces; (Complete) Boolean algebra; Stone adjacency space; (Closed) relations; u-Points; Mereocompact s