广西师范学院学报(自然科学版)
廣西師範學院學報(自然科學版)
엄서사범학원학보(자연과학판)
JOURNAL OF GUANGXI TEACHERS EDUCATION UNIVERSITY(NATURAL SCIENCE EDITION)
2014年
1期
23-27
,共5页
Kronecker积%平面性%粘合
Kronecker積%平麵性%粘閤
Kronecker적%평면성%점합
Kronecker product%planarity%glue
设 G1和 G2是两个连通图,则G1和G2的Kronecker积G1× C2定义如下:V (G1× G2)= V (G1)× V (G2),E(G1× G2)={(u1,v1)(u2,v2):u1 u2∈ E(G1),v1 v2∈ E(G2)}.该文证明了如果 G = G1× G2是平面图并且 Gi ≥3,那么 G1和G2都是平面图;还完全确定了 Pn × G2的平面性,n =3,4.
設 G1和 G2是兩箇連通圖,則G1和G2的Kronecker積G1× C2定義如下:V (G1× G2)= V (G1)× V (G2),E(G1× G2)={(u1,v1)(u2,v2):u1 u2∈ E(G1),v1 v2∈ E(G2)}.該文證明瞭如果 G = G1× G2是平麵圖併且 Gi ≥3,那麽 G1和G2都是平麵圖;還完全確定瞭 Pn × G2的平麵性,n =3,4.
설 G1화 G2시량개련통도,칙G1화G2적Kronecker적G1× C2정의여하:V (G1× G2)= V (G1)× V (G2),E(G1× G2)={(u1,v1)(u2,v2):u1 u2∈ E(G1),v1 v2∈ E(G2)}.해문증명료여과 G = G1× G2시평면도병차 Gi ≥3,나요 G1화G2도시평면도;환완전학정료 Pn × G2적평면성,n =3,4.
Let G1 and G2 be two connected graphs .The Kronecker product G1 × G2 is the graph with vertex set V (G1 × G2 )=V (G1 ) × V (G2 ) and the edge set E(G1 × G2 )={(u1 ,v1 )(u2 ,v2 )∶ u1 u2∈ E(G1 ) ,v1 v2 ∈ E(G2 )} .We consider the planarity of G1 × G2 .In particular ,we totally determine that w hen Pn × G2 is plallar ,n=2 ,3 .