complement of a graph造句

An antihole is the complement of a graph hole.
The complement of a graph has an edge between two vertices if and only if the original graph does not have an edge between the same two vertices.
For, each color class in a coloring of the complement of a bipartite graph is of size at most 2 and the classes of size 2 form a matching, a clique in the complement of a graph " G " is an independent set in " G ", and as we have already described an independent set in a bipartite graph " G " is a complement of a vertex cover in " G ".
It's difficult to find complement of a graph in a sentence. 用complement of a graph造句挺难的