918252.fig.0026a
(a) and are active
918252.fig.0026b
(b) and are active
918252.fig.0026c
(c) and are active
918252.fig.0026d
(d) and are active
Figure 26: cannot be fully unit-disk covered by two opposite polar nodes from , even if all the nodes in and are active. The shaded regions indicate the uncovered regions.