Swords can be single or double-bladed edges, or even edgeless. Even larger gap-less areas could be created using the technology of edgeless sensors. An edgeless graph with two or more vertices is disconnected. And it is both a complete graph and an edgeless graph. A graph with only vertices and no edges is known as an "edgeless graph". Commonly referred to as "China balls", they provide soft, edgeless light to a scene.