完全圖

Also known as complete digraph, complete graphs, complete digraphs, 2K1-free graph

任兩相異節點間洽有一條邊相連的無向圖

Key facts

Vertices: n
Edges: n ( n − 1 ) 2 {\displaystyle \textstyle {\frac {n(n-1)}{2}}}
Radius: { 0 n ≤ 1 1 otherwise {\displaystyle \left\{{\begin{array}{ll}0&n\leq 1\\1&{\text{otherwise}}\end{array}}\right.}
Diameter: { 0 n ≤ 1 1 otherwise {\displaystyle \left\{{\begin{array}{ll}0&n\leq 1\\1&{\text{otherwise}}\end{array}}\right.}
Girth: { ∞ n ≤ 2 3 otherwise {\displaystyle \left\{{\begin{array}{ll}\infty &n\leq 2\\3&{\text{otherwise}}\end{array}}\right.}
Automorphisms: n ! ( S n )
Chromatic number: n
Chromatic index: n if n is odd n − 1 if n is even
Spectrum: { ∅ n = 0 { 0 1 } n = 1 { ( n − 1 ) 1 , − 1 n − 1 } otherwise {\displaystyle \left\{{\begin{array}{lll}\emptyset &n=0\\\left\{0^{1}\right\}&n=1\\\left\{(n-1)^{1},-1^{n-1}\right\}&{\text{otherwise}}\end{array}}\right.}
Properties: ( n − 1) -regular Symmetric graph Vertex-transitive Edge-transitive Strongly regular Integral
Notation: K n

via Wikipedia infobox

Wikidata facts

Subclass of: Moore graph
Image: Complete graph example.svg

Show 6 more facts

maintained by WikiProject: WikiProject Mathematics
Commons category: Complete graphs
graph diameter: 1
graph radius: 1
studied by: graph theory
opposite of: edgeless graph

Sources (2)

via Wikidata · CC0

Article · 中文

在图论中，完全图是一个简单的无向图，其中每一对不同的顶点都只有一条边相连。完全有向图是一个有向图，其中每一对不同的顶点都只有一对边相连（每个方向各一个）。图论起源于欧拉在1736年解决七桥问题上做的工作，但是通过将顶点放在正多边形上来绘制完全图的尝试，早在13世纪拉蒙·柳利的工作中就出现了。这种画法有时被称作神秘玫瑰。

Abstract from DBpedia / Wikipedia · CC BY-SA