Complete product

Complete product --- полное произведение.

The complete product [math]\displaystyle{ G_{1} \nabla G_{2} }[/math] of graphs [math]\displaystyle{ G_{1} }[/math] and [math]\displaystyle{ G_{2} }[/math] is the graph obtained from the union of graphs [math]\displaystyle{ G_{1} \cup G_{2} }[/math] by joining every vertex of [math]\displaystyle{ G_{1} }[/math] with every vertex of [math]\displaystyle{ G_{2} }[/math].