Figure 17
(a) A planar geometric graph with unequal edge lengths; (b) the unit-distance graph from (a) now equalized. In (b), the T⋯T separation 2–2′ is the same length as the T–T distance and thus this chain geometry is not allowed. (c) The unit-distance graph in (b) where green vertices are moved out of the plane of the page and yellow vertices are moved in the plane of the page such that the T⋯T separation 2–2′ is greater than the T–T distance. Legend as in Fig. 10. |