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Proyecciones (Antofagasta)

Print version ISSN 0716-0917


KARIM, N. S. A.  and  HASNI, R.. A new family of chromatically unique 6-bridge graph. Proyecciones (Antofagasta) [online]. 2018, vol.37, n.2, pp.239-263. ISSN 0716-0917.

For a graph G, let P(G,λ) denote the chromatic polynomial of G. Two graphs G and H are chromatically equivalent (or simply χ-equivalent), denoted by G∼ H, if P(G,λ)=P(H,λ). A graph G is chromatically unique (or simply χ-unique) if for any graph H such as H∼ G, we have H≅ G, i.e, H is isomorphic to G. In this paper, the chromatic uniqueness of a new family of 6-bridge graph θ (a,a,b,b,b,c) where 2≤ a≤ b≤ c, is investigated.

Keywords : Chromatic polynomial; Chromatically unique; 6-bridge graph..

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