Asteroidal triple

Asteroidal triple --- астероидальная тройка.

Three pairwise nonadjacent vertices [math]\displaystyle{ u, v, w }[/math] of [math]\displaystyle{ G }[/math] are an asteroidal triple of [math]\displaystyle{ G }[/math] if for any two of them there is a path connecting the two vertices which avoids the neighborhood of the remaining vertex.