查询词典 chromatic number

Ifσ: I→C is an incidence coloring of G and |C|=k, k is a positive integer, then we say that G is k- incidence colorable andσis a k - incidence coloring of G; The minimum value of k such that G is k -incidence colorable is called the incidence chromatic number of G, and is denoted byχ_i, namelyχ_i = min {|C||σ: I→C is an incidence coloring of G}.

若σ：I(G→C是G的一个关联着色且|C|=k，k是一个正整数，则称G是k-可关联着色的，σ是G的一个k-关联着色；使得G是k-可关联着色的最小的k值称为G的关联色数，记为X_i，即X_i=min{|C||σ：I→C是G的关联着色}。

If G is acyclically L-list colorable for any list assignment with |L|≥κfor all v∈V,then G is acyclicallyκ-choosable.The acyclic list chromatic number,denoted byχ_a~l,of a graph G is the smallest integerκsuch that G is acyclicallyκ-choosable.

若对满足|L|≥κ，v∈V的色列表L，G都是无圈L-可染的，那么称G是无圈κ-可选择的。G的无圈列表色数χ_a~l是使得G是无圈κ-可选择的最小的非负整数κ。

In section two,we will prove thatχ_s=εΔ,where T is a tree andε(∈[1,2]) is a real number,by using the result of tree,we bound the star chromatic index of Halin graphs and monocycle graphs.

第二节研究了树的星边染色，证明了对最大度为Δ的树T，存在实数ε(1≤ε≤2)使得χ_s=εΔ，最后利用树的结果给出了Halin图和单圈图星边色数的上界。

Powered by the sparkling 70 bhp 1.3 16v Multijet turbodiesel engine, the Lancia Ypsilon MomoDesign has the same dimensions and architecture as the other versions in the range, but includes a number of aesthetic and chromatic features peculiar to this version, starting with the special 'Orange' paintwork (the colour of some of the luminous inserts that decorate the stand).

本站由波光粼粼的70马力13气门多点喷射涡轮增压柴油发动机，蓝旗亚地老虎MomoDesign具有相同的尺寸和该区域中的其他版本的架构，而是包括了美学和色彩所特有的功能，此版本与特殊的'橙色开始，数'漆（其颜色的发光插入的一些装饰的立场）。

The theory of graphs and relations between the spectra and fixed variate (e.g. chromatic number, degree sequence, diameter and connectivity) of graphs by means of the well-developed theory and technique of algebra, topological structure properties of graph, combination and matrix theories so as to establish firm essential relation between the algebraic properties and topological properties of graphs and networks.

图谱理论的研究主要是利用成熟的代数理论和技巧，并结合图的拓扑结构性质和组合数学的理论、矩阵理论来研究图谱及其与图的结构性质、图的其它不变量(如色数，度序列，直径，连通度等)之间的关系，将图与网络的代数性质与图的拓扑性质紧密地联系在—起。

In this paper, we discuss the first weak total chromatic number of the double graph of path, circle, star, fan, wheel and complete.

给出了路、圈、星、扇、轮、完全图的倍图的第一类弱全色数。

One is the comparison with violet durable, inexpensive source of light, in a variety of plate without treatment process; three is to speed up the plate sanshang, scale; 4 is to increase the digital source of lead characters chromatic number, step up, process, color management, so that the traditional business card printing products can be easier to keep up with the digital proofing.

一是拔存紫激光等比力耐用、昂贵的光源；二是拔存百般版材不任办理工艺；不一是放慢版材的国产冻、范畴冻；四是补充数码打样机色数，放松泉源、历程、终端摆设的色彩处置，以便使古板制卡产物可以比力便当不天追上数码打样的成果。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐