[See also Knowledge spaces.] -------------------------------------------------- 29089 W. Armstrong: Dependency structures of data base relationships. Inf. Proc. 74 (1974), 580-583. 26820 F. Bennett/L. Wu: On minimum matrix representations of closure operations. Discrete Appl. Math. 26 (1990), 25-40. 26819 F. Bennett/L. Wu: Minimum matrix representations of Sperner systems. Discrete Appl. Math. 8/1 (1998), 9-17. 16285 Paolo Bonora: Spazi topologici finiti e analisi formale dei concetti. Tesi laurea triennale, Ferrara 2004. 16294 Silke Brandt/Dietrich Albert/Cord Hockemeyer: Surmise relations between tests - preliminary results of the mathematical modeling. Internet 1999, 15p. 16292 Silke Brandt/Dietrich Albert/Cord Hockemeyer: Surmise relations between tests - mathematical considerations. Discrete Appl. Math. 127 (2003), 221-239. 16103 Nathalie Caspard/Bernard Monjardet: The lattices of Moore families and closure operators on a finite set - a survey. Internet 1999, 26p. Preliminary version of 16101. 16101 Nathalie Caspard/Bernard Monjardet: The lattices of closure systems, closure operators, and implicational systems on a finite set - a survey. Discrete Appl. Math. 127 (2003), 241-269. 26981 J. Demetrovics: On the equivalence of candidate keys with Sperner systems. Internet ca. 1979, 6p. 26980 J. Demetrovics/Z. Füredi/G. Katona: Minimum matrix representations of closure operations. Discrete Appl. Math. 11 (1985), 115-128. 26603 J. Demetrovics/G. Katona: A survey of some combinatorial results concerning functional dependencies in database relations. Ann. Math. Artif. Intell. 7 (1993), 63-82. 16298 Klaus Dohmen: Improved inclusion-exclusion identities via closure operators. Discrete Math. Theor. Comp. Sci. 4 (2000), 61-66. 16107 Vincent Duquenne: Latticial structures in data analysis. Theor. Comp. Sci. 217 (1999), 407-436. 16291 Paul Edelman/Robert Jamison: The theory of convex geometries. Geom. Ded. 19 (1985), 247-270. 7331 Josef Eschgfäller: Almost topological spaces. Ann. Univ. Ferrara 30 (1984), 163-183. 28793 Bernhard Ganter: Lernen in Wissensräumen. Vortrag Dresden 2017, 28p. 16106 Akira Higuchi: Lattices of closure operators. Discrete Math. 179 (1998), 267-272. 16100 Roman König: Endliche Hüllensysteme und ihre Implikationenbasen. Sem. Loth. Comb. 49 (2003), ... 18950 Nigel Ray/William Schmitt: Coclosure operators and chromatic polynomials. Proc. Nat. Ac. Sci. USA 87 (1990), 4685-4687. 29017 Gunther Schmidt/Rudolf Berghammer: Contact, closure, topology, and the linking of row and column types of relations. J. Logic Alg. Progr. ... (2011), 23p. 15619 M. Smyth: Semimetrics, closure spaces and digital topology. Theor. Comp. Sci. 151 (1995), 257-276.