نتایج جستجو برای: chromatic number
تعداد نتایج: 1174754 فیلتر نتایج به سال:
Journal:
:Electronic Journal of Combinatorics
2021
A signed graph is a pair $(G, \sigma)$, where $G$ (loops and multi edges allowed) $\sigma: E(G) \to \{+, -\}$ signature which assigns to each edge of sign. Various notions coloring graphs have been studied. In this paper, we extend circular graphs. Given \sigma)$ with no positive loop, $r$-coloring an assignment $\psi$ points circle circumference $r$ the vertices such that for every $e=uv$ $G$,...
Journal:
:European Journal of Combinatorics
2019
Journal:
:Journal of Combinatorial Theory, Series A
2018
Journal:
:Electronic Notes in Discrete Mathematics
2016
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