v的完備匹配Mi的算法"/>
999精品在线视频,手机成人午夜在线视频,久久不卡国产精品无码,中日无码在线观看,成人av手机在线观看,日韩精品亚洲一区中文字幕,亚洲av无码人妻,四虎国产在线观看 ?摘 要:給出了邊矩陣的定義,提出了求解完備匹配Mi的2種算法.其中算法A是利用邊矩陣K′2n的Δ(G)-邊著色求Mi,算法B是利用邊矩陣K′2n的2×2子矩陣劃分及完全圖Kn的n-1個完備匹配M′i的求解,再求Mi.介紹了用算法A構造循環賽圖K(i)20的過程和用算法B構造循環賽圖K(i)20的過程.
關鍵詞:完備匹配;完全圖;算法;邊矩陣;邊著色
中圖分類號:O157 文獻標識碼:A
Algorithms of Determining Any Perfect Matching Mi of Kv
ZHENG Chang-bo1, LI Xiao-yi2, CHOU Wan-xi3
(1. Vocational and Technical College,Dalian Ocean Univ,Dalian, Liaoning 116300,China;
2. School of Mathematics and Systems Science, Shenyang Normal Univ, Shenyang, Liaoning 110034, China;
3. School of Civil Engineering and Architecture, Anhui Univ of Science and Technology, Huainan, Anhui 232001, China)
Abstract:A definition of edge-matrix was given. And two algorithms for determining perfect matching Mi were proposed, of which the algorithm A is determined by using Δ(G)-edge coloring of edge-matrix K′2n, and the algorithm B to perfectly match Mi is determined by partitioning edge-matrix K′v into 2×2 sub matrix and also by solving n-1 perfect matching M′i of a complete graph Kn .The procedures of constructing round-robin tournament K(i)20 by using the algorithm A and using algorithm B were presented respectively.
Key words:dual;perfect matching;complete graph;algorithm;edge matrix;edge coloring
設G為完全圖K6,完全圖K6也稱為競賽圖,但完全圖K6尚無助于6名棋手的循環賽的名單安排,尚若用Δ(G)=5種顏色對K6進行Δ(G)-邊著色,則該完全圖K6就成為可用于循環賽安排的循環賽圖,并記為Ki6,i表示6名棋手的循環賽的輪次.但是,當n>10時,針對高階的完全圖K2n實施Δ(G)-邊著色是不可能的[1-6].為解決這一矛盾,本文提出了用Δ(G)種顏色A,B,C,…,X,Y等對K2n的三角形邊矩陣K′2n進行Δ(G)-邊著色,使得n個同色的邊互不相鄰,且被著了色的邊以A,B,C,…,X,Y等符號取代,從而形成Δ(G)-邊著色的邊矩陣K″2n.
1 基本思路
由于n個A色邊構成完備匹配M1,n個B色邊構成完備匹配M2,…,n個Y色邊構成完備匹配MΔ(G),Δ(G)個完備匹配M1,M2,…,M2n-1會形成一個長方形矩陣K(i)2n,所得的K(i)2n可用來安排2n名棋手的循環賽.此外,還提出依據2n階的循環賽圖K(i)2n求解4n階循環賽圖K(i)4n的一種算法[7-12].其思路是:1)將K4n的E(G)個邊按自然順序排列成上三角陣——邊矩陣K′4n,使得K′4n的任意邊CiCj分別與頂Ci和頂Cj相關聯;2)將邊矩陣K′4n劃分出n(2n-1)個2×2子矩陣——完全二分圖K(i,j)2,2,從而形成由完全二分圖K(i,j)1,1及K(i,j)2,2構成的三角形矩陣K″4n;3)依據已存在的循環賽圖K2n的完備匹配,將K″4n的三角陣重新排成長方形矩陣K″4n,使得2n個K1,1位于K(i)4n的首行,而將K2n的完備匹配M1,M2,…,M2n-1置于長方形矩陣K(i)4n的2,3,…,2n行[13-15].
2 求K(i)v的Δ(G)-邊著色法
設v=20,則求循環賽圖K(i)20的關鍵是確定K20中的Δ(G)=19個完備匹配M1,M2,…,M19.算法的步驟是:
1)將K20的E(G)個邊按自然順序排成上三角形矩陣K′20,使K′20的任意邊CiCj分別與頂Ci和頂Cj相關聯;
2)將邊矩陣K′20中的C1行的邊分別著上A,B,C,…,Q,R等顏色,C19列的邊分別著上R,S,A,B,…,O,P等顏色,將C19左側上三角陣35條斜線上的邊分別著上A,B,C,…R,S,A,B,…,O,P等顏色.最后,將C20列的邊分別著上S,B,D,F,…,O,Q等顏色.從而得邊矩陣K′20的Δ(G)-邊著色,并記為K″20;
3 求K(i)v的完全二分圖劃分法
設v=4n,若2n階循環賽圖K(i)2n為已存在的,如10階循環賽圖K(i)10的矩陣表達式,是由9個完備匹配M1,M2,…,M9構成,則4n階循環賽圖K(i)4n的求解,亦即求20階循環賽圖K(i)20,可借助于2n階的循環賽圖K(i)2n求4n階的循環賽圖K(i)4n,或者利用10階循環賽圖K(i)10求解20階循環賽圖K(i)20,算法的步驟:
1)與前一算法相同,求完全圖K20的邊矩陣K′20;
2)將邊矩陣K′20劃分出5×9個2×2的子矩陣,等價于將完全圖K20劃分成5×9個完全二分圖K(i,j)2,2和10個完全二分圖K(i)1,1.
3)依據已存在的10階循環賽圖K(i)10的9個完全匹配,將K′20的5×9個2×2子矩陣或完全二分圖K(i,j)2,2排成5×9的長方形矩陣,而將10個完全二分圖K(i)1,1置于5×9長方矩陣的上方,即得20階循環賽圖K(i)20的矩陣表達式:
至此,當n>10時,高階的完全圖K2n實施Δ(G)-邊著色是可能的且可行的.
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