Disjoint union of graphs
= Disjoint union of graphs
{wiki}
The disjoint union $\Gamma_1\sqcup\Gamma_2$ has the vertices and edges of the two graphs and no edge joining the two parts.
= Disjoint union of graphs
{wiki}
The disjoint union $\Gamma_1\sqcup\Gamma_2$ has the vertices and edges of the two graphs and no edge joining the two parts.