Concrete Graph Covering Projections

Hofmeister, Michael (1991) Concrete Graph Covering Projections.
Published in: Ars combinatoria : a Canadian journal of combinatorics Vol. 32. pp. 121-127.


A graph covering projection is a local graph homeomorphism. Certain partitions of the vertex set of the preimage graph induce a notion of ''concreteness''. The concrete graph covering projections will be counted up to isomorphism.

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