O. Aichholzer, S. W. Bae, L. Barba, P. Bose, M. Korman, A. van Renssen,
P. Taslakian, and S. Verdonschot
In this paper, we show that the

-graph with three cones is connected.
We also provide an alternative proof of the connectivity of the Yao graph
with three cones.