143732.fig.003
Figure 3: Example of node-label-constraints for sets of two nodes (3.23) dominating Inequalities (3.22), that is, the node-label constraints for single nodes. For both nodes 𝑣 𝑖 , 𝑖 = 1 , 2 it holds that 𝑙 𝐿 ( 𝑣 𝑖 ) 𝑙 1 . Corresponding Inequality (3.23) is however violated, as 𝑙 𝐿 ( 𝑣 1 ) 𝐿 ( 𝑣 2 ) 𝑙 = 3 / 2 .