cographs

Noun

cograph (plural cographs)

1. A graph formed from another by complementation and disjoin union.
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.
   • 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...