Chromatic spectrumThe chromatic number chi ((G, sigma)) of a signed graph (G, sigma) is the smallest number k for which there is a function c : V(G) -> Z(k) such that c(v) not equal sigma(e)c(w) for every edge e = vw. Let Sigma(G) be the set of all signatures of G...
The Eigenvalues of a Graph and Its Chromatic Number 来自 ResearchGate 喜欢 0 阅读量: 220 作者: HS Wilf 摘要: Let G be a finite, connected, undirected graph, without loops or multiple edges. If v is a vertex of G, the degree of v, p {v), is the number of edges emanating from...
The smallest number of colours necessary to colour the nodes of agraphso that no two adjacent nodes have the same colour. See also:four colour map theorem. Graph Theory Lessons. Eric Weisstein's World Of Mathematics. The Geometry Center. ...
5. Objective:To study the effect of light from different direction on digital chromatic value. 目的:研究不同方向光源对数码色度值的影响。 6. The adjacent strong edge chromatic number of join graph of star and path is obtained. 证明了圈Cm与圈C5n的笛卡尔积图的全色数和邻强边色数都为5。
Let G be a connected simple graph with n vertices having chromatic number χ. The distance Laplacian matrix DL(G) is defined as DL(G)=Diag(Tr)−D, where Diag(Tr) is the diagonal matrix of vertex transmissions and D is the distance matrix of G. The eigenvalues of DL(G) are the di...
Block-graph Equitable coloring Chromatic spectrum Linear hypertree Symmetric-like block graph EFL conjecture 1. Introduction A hypergraph is a pair H=(V,E), where V is an n element set of vertices of H and E is a family of m non-empty subsets of V called edges or hyperedges. Let [k...
Finite graphs that have a common chromatic polynomial have the same number of regular $n$-colorings. A natural question is whether there exists a natural b... M Yoshinaga - 《Mathematics》 被引量: 2发表: 2015年 Chromatic functors of graphs Finite graphs that have a common chromatic polynomia...
chromatic numberWe give some necessary conditions for a graph to be 3-chromatic in terms of the spectrum of the adjacency matrix. For all known distance-regular graphs it is determined whether they are 3-chromatic. A start is made with the classification of 3-chromatic distance-regular graphs,...
The copper foil for a negative electrode current collector with a chromate film according to the present application is preferably such that the apparent coordination number N of the oxygen closest to chrome in the chromate film is 4.5 or greater. patents-wipo The colour boundaries of signal lig...
Scientific Reports volume 7, Article number: 46358 (2017) Cite this article 7743 Accesses 58 Citations 28 Altmetric Metrics details Abstract X-ray spectromicroscopy with a full-field imaging technique is a powerful method for chemical analysis of heterogeneous complex materials with a nano-scale ...