@Article{adaricheva_et_al:DagRep.4.5.1, author = {Adaricheva, Kira V. and Italiano, Giuseppe F. and Kleine B\"{u}ning, Hans and Tur\'{a}n, Gy\"{o}rgy}, title = {{Horn formulas, directed hypergraphs, lattices and closure systems: related formalisms and applications (Dagstuhl Seminar 14201)}}, pages = {1--26}, journal = {Dagstuhl Reports}, ISSN = {2192-5283}, year = {2014}, volume = {4}, number = {5}, editor = {Adaricheva, Kira V. and Italiano, Giuseppe F. and Kleine B\"{u}ning, Hans and Tur\'{a}n, Gy\"{o}rgy}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/DagRep.4.5.1}, URN = {urn:nbn:de:0030-drops-46193}, doi = {10.4230/DagRep.4.5.1}, annote = {Keywords: Horn formulas, directed hypergraphs, lattices, closure system, data bases, implicational systems and concept analysis} }