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Hereditarnia : ウィキペディア英語版 | Hereditarnia
Hereditarnia is a virtual pleasant place that is related to the development of the theory of hereditary properties of graphs (a part of graph theory). Hereditarnia is a special word that cannot be found in any dictionary. It was invented by Izak Broere. It is a combination of English word heredity and a quite common Polish suffix 'arnia' that is used in many words denoting pleasant places like kwiaciarnia, piwiarnia, Palmiarnia Zielenogórska, winiarnia, etc. == Hereditary properties of graphs == A property of a graph is an isomorphism-closed subset of the set of all finite non-oriented graphs. A property is called hereditary if it is closed under taking subgraphs. A property is called induced-hereditary if it is closed under taking induced subgraphs. A property is called additive if it is closed under taking disjoint union of graphs. The main concepts related to hereditary properties of graphs can be find in A Survey of Hereditary Properties of Graphs.〔(M. Borowiecki, I. Broere, M. Frick, P. Mihók, G. Semanišin :A Survey of Hereditary Properties of Graphs ), Discussiones Mathematicae – Graph Theory 17 (1997) 5–50.〕
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