Definitions for cograph
co·graph

WiktionaryRate this definition:0.0 / 0 votes

1. cographnoun

   A graph formed from another by complementation and disjoin union

WikipediaRate this definition:0.0 / 0 votes

1. Cograph

   In graph theory, a cograph, or complement-reducible graph, or P4-free graph, is a graph that can be generated from the single-vertex graph K1 by complementation and disjoint union. That is, the family of cographs is the smallest class of graphs that includes K1 and is closed under complementation and disjoint union. Cographs have been discovered independently by several authors since the 1970s; early references include Jung (1978), Lerchs (1971), Seinsche (1974), and Sumner (1974). They have also been called D*-graphs, hereditary Dacey graphs (after the related work of James C. Dacey Jr. on orthomodular lattices), and 2-parity graphs. They have a simple structural decomposition involving disjoint union and complement graph operations that can be represented concisely by a labeled tree, and used algorithmically to efficiently solve many problems such as finding the maximum clique that are hard on more general graph classes. Special cases of the cographs include the complete graphs, complete bipartite graphs, cluster graphs, and threshold graphs. The cographs are, in turn, special cases of the distance-hereditary graphs, permutation graphs, comparability graphs, and perfect graphs.

WikidataRate this definition:0.0 / 0 votes

1. Cograph

   In graph theory, a cograph, or complement-reducible graph, or P4-free graph, is a graph that can be generated from the single-vertex graph K1 by complementation and disjoint union. That is, the family of cographs is the smallest class of graphs that includes K1 and is closed under complementation and disjoint union. Cographs have been discovered independently by several authors since the 1970s; early references include Jung, Lerchs, Seinsche, and Sumner. They have also been called D*-graphs, hereditary Dacey graphs, and 2-parity graphs. See, e.g., Brandstädt, Le & Spinrad for more detailed coverage of cographs, including the facts presented here.

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1. cographverb

   To bring accurate calculations in addition to the basis.

   The game was so good until they cographed in over time.

   Etymology: Add live (fruitful)

   
   

   Submitted by tehorah23 on May 11, 2023  

How to pronounce cograph?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say cograph in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of cograph in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of cograph in Pythagorean Numerology is: 5

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Cograph
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Cograph
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=cograph