Figure 22
(a) The 3V24V1 (2×1, 4×22) b chain graph and the corresponding unit-distance graph; (b) the 3V24V1 (2×1, 2×2, 2×21) chain graph and the corresponding unit-distance graph in which vertices are forced into and out of the plane of the unit-distance graph (indicated by a red `u' or `d'). Both unit-distance graphs are incompatible and T⋯Tmin separations less than γ are shown with red dashed lines. Legend as in Fig. 18. |