In: Advanced Math
Give an example of two non-isomorphic maximal planar graphs of the same order.
Given that,
We consider the graphs on 10 vertices: and , respectively. The edges of are given below:
Now, the edges for are as follows:
These are planar graphs of order 10, (see diagrams) having 24 edges each; they are maximal since addition of an extra edge to either would make it non-planar. However, they are non-isomorphic since the maximal degrees differ: we have
.