The graph T????B?gA_D?D??o?qCOaCUHI_aGQcJC?qF?
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: