Smallest Multiple Coronoids

In the second example of Par. 3.5.3 the unique smallest multiple coronoid for = 7 was derived from coronene according to the algorithm under consideration. Another such system emerges from C25H13 benzo[/u]anthanthrene. This nonextremal benzenoid has 25 internal vertices (iV) against = 24 (cf. Table 3). On the other hand, its minimum number of parallel... 

The three systems depicted above are also consistent with the assumptions formulated in this paragraph. Herefrom it is clear that these assumptions are not sufficient for a multiple coronoid to be a smallest system. It is even not implied that the formulated assumptions are necessary. 

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