WebWe extend the work of Hanlon on the chromatic polynomial of an unlabeled graph to define the unlabeled chromatic polynomial of an unlabeled signed graph. Explicit formulas are … Webresearch on coloring and the chromatic number of signed graphs. The concept of coloring a signed graph was introduced by Zaslavsky [3] in 1981. He formally de nes a signed graph …

Circular coloring of signed graphs - Kang - Wiley Online Library

WebJan 1, 1982 · Coloring a signed graph by signed colors, one has a chromatic polynomial with the same enumerative and algebraic properties as for ordinary graphs. New … WebThe achromatic number of a signed graph is then de ned in the same way as for ordinary graphs. It is worth to notice that complete colorings of signed graphs have been studied … solo wortherkunft

Unlabeled signed graph coloring - projecteuclid.org

WebMay 21, 2013 · By an s-coloring of a signed graph we mean a coloring of its vertices such that any two vertices joined by a c-edge receive different colors. The s-chromatic number … WebMar 19, 2024 · Correspondence colorings of graphs were introduced in 2024 by Dvořák and Postle as a generalization of list colorings of graphs which generalizes ordinary graph … WebA signed graph is a pair (G, σ), where G is a graph and σ: E (G) → {1, − 1} assigns to each edge e a sign σ e ∈ {1, − 1}. Colouring of signed graphs has been studied in many papers. … soloworld