The graph T???C@?GC_H_S_IG?YE@Oa_acOHaE?LB?W[_
Unembeddable subgraph
The graph
IpD?GUbV?
is a subgraph of this graph. It is not embeddable. Hence, this
graph is not embeddable either. One possible monomorphism
of the unembeddable graph into this one, is given by: