scholarly journals Asymptotically optimal induced decompositions

2014 ◽  
Vol 8 (2) ◽  
pp. 320-329
Author(s):  
Veronika Halász ◽  
Zsolt Tuza
Keyword(s):  
Graph Theory ◽  
Lower Bound ◽  
Complete Multipartite Graph ◽  
Asymptotically Optimal ◽  
Asymptotic Growth ◽  
Tripartite Graph ◽  
Multipartite Graph ◽  
Complete Multipartite ◽  
Complete Tripartite Graph

Solving a problem raised by Bondy and Szwarcfiter [J. Graph Theory, 72 (2013), 462-477] we prove that if the edge set of a graph G of order n can be decomposed into edge-disjoint induced copies of the path P4 or of the paw K4?P3, then the complement of G has at least cn3/2 edges. This lower bound is tight apart from the actual value of c, and completes the determination of asymptotic growth for the graphs with at most four vertices. More generally the lower bound cn3/2 holds for any graph without isolated vertices which is not a complete multipartite graph; but a linear upper bound is valid for any complete tripartite graph.

scholarly journals Partition Dimension of Complete Multipartite Graph

2020 ◽  
Vol 16 (3) ◽  
pp. 365 ◽  
Author(s):  
Safriadi Safriadi ◽  
Hasmawati Hasmawati ◽  
Loeky Haryanto
Keyword(s):  
Graph Theory ◽  
Robotic Navigation ◽  
Complete Multipartite Graph ◽  
Interesting Study ◽  
Partition Dimension ◽  
Multipartite Graph ◽  
Complete Multipartite ◽  
Compound Classification ◽  
Internet Network

Determining a resolving partition of a graph is an interesting study in graph theory due to many applications like censor design, compound classification in chemistry, robotic navigation and internet network. Let  and , the distance between  an  is . For an ordered partition  of , the representation of  with respect to  is . The partition  is called a resolving partition of  if all representation of vertices are distinct. The partition dimension of graph  is the smallest integer  such that  has a resolving partition with  element.In this thesis, we determine the partition dimension of complete multipartite graph  ,  which is limited by , with  and . We found that , , and , .

scholarly journals The Size, Multipartite Ramsey Numbers for nK2 Versus Path–Path and Cycle

Mathematics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 764
Author(s):  
Yaser Rowshan ◽  
Mostafa Gholami ◽  
Stanford Shateyi
Keyword(s):  
Positive Integer ◽  
Ramsey Number ◽  
Complete Multipartite Graph ◽  
Ramsey Numbers ◽  
Multipartite Graph ◽  
Complete Multipartite ◽  
Monochromatic Copy

For given graphs G1,G2,…,Gn and any integer j, the size of the multipartite Ramsey number mj(G1,G2,…,Gn) is the smallest positive integer t such that any n-coloring of the edges of Kj×t contains a monochromatic copy of Gi in color i for some i, 1≤i≤n, where Kj×t denotes the complete multipartite graph having j classes with t vertices per each class. In this paper, we computed the size of the multipartite Ramsey numbers mj(K1,2,P4,nK2) for any j,n≥2 and mj(nK2,C7), for any j≤4 and n≥2.

Codes from multipartite graphs and minimal permutation decoding sets

2015 ◽  
Vol 07 (04) ◽  
pp. 1550060
Author(s):  
P. Seneviratne
Keyword(s):  
Automorphism Group ◽  
Error Correcting Code ◽  
Binary Codes ◽  
Hard Problem ◽  
Complete Multipartite Graph ◽  
Decoding Algorithm ◽  
Permutation Decoding ◽  
Multipartite Graphs ◽  
Multipartite Graph ◽  
Complete Multipartite

Permutation decoding method developed by MacWilliams and described in [Permutation decoding of systematic codes, Bell Syst. Tech. J. 43 (1964) 485–505] is a decoding technique that uses a subset of the automorphism group of the code called a PD-set. The complexity of the permutation decoding algorithm depends on the size of the PD-set and finding a minimal PD-set for an error correcting code is a hard problem. In this paper we examine binary codes from the complete-multipartite graph [Formula: see text] and find PD-sets for all values of [Formula: see text] and [Formula: see text]. Further we show that these PD-sets are minimal when [Formula: see text] is odd and [Formula: see text].

scholarly journals The Energy Change of the Complete Multipartite Graph

2020 ◽  
Vol 36 (36) ◽  
pp. 309-317
Author(s):  
Haiying Shan ◽  
Changxiang He ◽  
Zhensheng Yu
Keyword(s):  
Linear Algebra ◽  
Singular Values ◽  
New Method ◽  
Energy Change ◽  
Natural Question ◽  
Complete Multipartite Graph ◽  
Multipartite Graph ◽  
Energy Of Graph ◽  
Complete Multipartite ◽  
Edge Addition

The energy of a graph is defined as the sum of the absolute values of all eigenvalues of the graph. Akbari et al. [S. Akbari, E. Ghorbani, and M. Oboudi. Edge addition, singular values, and energy of graphs and matrices. {\em Linear Algebra Appl.}, 430:2192--2199, 2009.] proved that for a complete multipartite graph $K_{t_1 ,\ldots,t_k}$, if $t_i\geq 2 \ (i=1,\ldots,k)$, then deleting any edge will increase the energy. A natural question is how the energy changes when $\min\{t_1 ,\ldots,t_k\}=1$. In this paper, a new method to study the energy of graph is explored. As an application of this new method, the above natural question is answered and it is completely determined how the energy of a complete multipartite graph changes when one edge is removed.

scholarly journals Cyclic cycle systems of the complete multipartite graph

2019 ◽  
Vol 28 (3) ◽  
pp. 224-260
Author(s):  
Andrea Burgess ◽  
Francesca Merola ◽  
Tommaso Traetta
Keyword(s):  
Complete Multipartite Graph ◽  
Cycle Systems ◽  
Multipartite Graph ◽  
Complete Multipartite

scholarly journals On claw-decomposition of a complete multipartite graph

1978 ◽  
Vol 8 (1) ◽  
pp. 207-210 ◽  
Author(s):  
Kazuhiko Ushio ◽  
Shinsei Tazawa ◽  
Sumiyasu Yamamoto
Keyword(s):  
Complete Multipartite Graph ◽  
Multipartite Graph ◽  
Complete Multipartite
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