In this note we extend the Mulder-Nebeský characterization of the interval function of a connected graph to the disconnected case. One axiom needs to be adapted, but also a new axiom is needed in addition.

N. Narayanan

Department of Mathematics

Changat M.

Nezhad F.H.

Mulder H.M.

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Journal	Discussiones Mathematicae - Graph Theory
ISSN	20835892
Open Access	No