Fig. 6
The top row shows a hypothetical molecule M with two different bond sets \(M'\) and \(M''\). The bonds in the bond sets are the edges labeled by numbers. \(M'\) admits only linear synthesis plans, whereas \(M''\) admits many, including a fully convergent one. The bottom row shows a linear plan based on \(M'\) and a fully convergent plan based on \(M''\)