scholarly journals The crossing numbers of some generalized Petersen graphs.

1981 ◽  
Vol 48 ◽  
pp. 184 ◽  
Author(s):  
G. Exoo ◽  
F. Harary ◽  
J. Kabell
2009 ◽  
Vol 157 (5) ◽  
pp. 1016-1023 ◽  
Author(s):  
Xiaohui Lin ◽  
Yuansheng Yang ◽  
Wenping Zheng ◽  
Lei Shi ◽  
Weiming Lu

1992 ◽  
Vol 104 (3) ◽  
pp. 311-320 ◽  
Author(s):  
Dan McQuillan ◽  
R. Bruce Richter

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 336
Author(s):  
Zehui Shao ◽  
Rija Erveš ◽  
Huiqin Jiang ◽  
Aljoša Peperko ◽  
Pu Wu ◽  
...  

A double Roman dominating function on a graph G=(V,E) is a function f:V→{0,1,2,3} with the properties that if f(u)=0, then vertex u is adjacent to at least one vertex assigned 3 or at least two vertices assigned 2, and if f(u)=1, then vertex u is adjacent to at least one vertex assigned 2 or 3. The weight of f equals w(f)=∑v∈Vf(v). The double Roman domination number γdR(G) of a graph G is the minimum weight of a double Roman dominating function of G. A graph is said to be double Roman if γdR(G)=3γ(G), where γ(G) is the domination number of G. We obtain the sharp lower bound of the double Roman domination number of generalized Petersen graphs P(3k,k), and we construct solutions providing the upper bounds, which gives exact values of the double Roman domination number for all generalized Petersen graphs P(3k,k). This implies that P(3k,k) is a double Roman graph if and only if either k≡0 (mod 3) or k∈{1,4}.


1989 ◽  
Vol 78 (1-2) ◽  
pp. 169-177 ◽  
Author(s):  
Gerald Schrag ◽  
Larry Cammack

2012 ◽  
Vol 160 (4-5) ◽  
pp. 436-447 ◽  
Author(s):  
Sarah Spence Adams ◽  
Paul Booth ◽  
Harold Jaffe ◽  
Denise Sakai Troxell ◽  
S. Luke Zinnen

2007 ◽  
Vol 307 (3-5) ◽  
pp. 534-543 ◽  
Author(s):  
Marko Lovrečič Saražin ◽  
Walter Pacco ◽  
Andrea Previtali

Author(s):  
Kuo-Hua Wu ◽  
Yue-Li Wang ◽  
Chiun-Chieh Hsu ◽  
Chao-Cheng Shih

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