Standard Lemma guide

cograph

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A graph formed from another by complementation and disjoin union.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The dual of the graph of a function. It is an ordinate-indexed partition of the disjoint union of the set of abscissas and ordinates of the function.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

Examples

  • Given a function whose graph is #92;#123;(1,7),(2,5),(3,3),(4,3),(5,2),(6,4),(7,6),(8,5),(9,7),(10,6),(11,6)#92;#125;, append an apostrophe to the abscissas so that they will not be confused with ordinates when obtaining their disjoint union, which is: #92;#123;2,3,4,5,6,7,1',2',3',4',5',6',7',8',9',10',11'#92;#125;. The cograph then is #92;#123;#92;#123;7,1',9'#92;#125;,#92;#123;6,7',10',11'#92;#125;,#92;#123;5,2',8'#92;#125;,#92;#123;4,6'#92;#125;,#92;#123;3,3',4'#92;#125;,#92;#123;2,5'#92;#125;#92;#125;.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From co- + graph.