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Graphs with near v- and e-neighbourhoods

Published online by Cambridge University Press:  18 May 2009

Dalibor Fronček
Affiliation:
Department of Mathematics, University of Mining and Metallurgy, Viězného Února, 708 33 Ostrava, Czechoslovakia.
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All the graphs considered in this paper are connected finite undirected graphs without loops and multiple edges.

By the vertex-neighbourhood (v-neighbourhood) of any vertex x in the graph G we mean the subgraph induced by the set of all vertices adjacent to x. Analogously by the edge-neighbourhood (e-neighbourhood) of any edge f with end vertices x, y we mean the subgraph (f) (or (xy)) induced by the set of all vertices which are adjacent to at least one vertex of the pair x, y and which are different from x, y.

Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 1990

References

REFERENCES

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