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Transactions of the American Mathematical Society
Transactions of the American Mathematical Society
ISSN 1088-6850(online) ISSN 0002-9947(print)

Exactly $ k$-to-$ 1$ maps between graphs


Authors: Jo Heath and A. J. W. Hilton
Journal: Trans. Amer. Math. Soc. 331 (1992), 771-785
MSC: Primary 05C10
MathSciNet review: 1043859
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Abstract: Suppose $ k$ is a positive integer, $ G$ and $ H$ are graphs, and $ f$ is a $ k{\text{-to-}}1$ correspondence from a vertex set of $ G$ onto a vertex set of $ H$. Conditions on the adjacency matrices are given that are necessary and sufficient for $ f$ to extend to a continuous $ k{\text{-to-}}1$ map from $ G$ onto $ H$.


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Additional Information

DOI: http://dx.doi.org/10.1090/S0002-9947-1992-1043859-X
PII: S 0002-9947(1992)1043859-X
Keywords: Graph, $ k{\text{-to-}}1$ function, $ k{\text{-to}} 1$ map
Article copyright: © Copyright 1992 American Mathematical Society