21–40 of
114 results.

Thodoris Karatasos
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Evi Papaioannou
In this work, we present an innovative image recognition technique which is based on the exploitation of transitdata in images or simple photographs of sites of interest. Our objective is to automati...

Anak Agung Gede Ngurah
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Rinovia Simanjuntak
A graph G of order p and size q is called super edgemagic if there exists a bijective function f from V(G) U E(G) to {1, 2, 3, ..., p+q} such that f(x) + f(xy) + f(y) is a constant for every edge $xy...

Bryan Freyberg
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Melissa Keranen
The following generalization of distance magic graphs was introduced in [2]. A directed Z_ndistance magic labeling of an oriented graph $\overrightarrow{G}=(V,A)$ of order n is a bijection $\overrigh...

Mustapha Aouchiche
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Pierre Hansen
The paper discusses bounds on the nullity number of graphs. It is proved in [B. Cheng and B. Liu, On the nullity of graphs. Electron. J. Linear Algebra 16 (2007) 6067] that $\eta \le n  D$, where $...

V. Yegnanarayanan
Let $p \ge 3$ be a positive integer and let $k \in {1, 2, ..., p1} \ \lfloor p/2 \rfloor$. The generalized Petersen graph GP(p,k) has its vertex and edge set as $V(GP(p, k)) = \{u_i : i \in Zp\} \cup...

Kijung Kim
In 2010, Kim, Park and Sano studied the competition numbers of Johnson graphs. They gave the competition numbers of J(n,2) and J(n,3).In this note, we consider the competition number of J(n,4).

I. Nengah Suparta
A Gray code of length n is a list of all binary words of length n such that each two successive codewords differ in only one bit position. If the first and the last codewords also share this property,...

Mehdi Alaeiyan
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Ayoob Mehrabani
Perfect coloring is a generalization of the notion of completely regular codes, given by Delsarte. A perfect mcoloring of a graph G with m colors is a partition of the vertex set of G into m parts A_...

Faraha Ashraf
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Martin Baca
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Andrea SemanicovaFenovcikova
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Ayesha Shabbir
A simple graph G=(V(G),E(G)) admits an Hcovering if every edge in E(G) belongs at least to one subgraph of G isomorphic to a given graph H. Then the graph G admitting Hcovering admits an Hirregular...

Suk J. Seo
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Peter J. Slater
A distinguishing set for a graph G = (V, E) is a dominating set D, each vertex $v \in D$ being the location of some form of a locating device, from which one can detect and precisely identify any give...

Amrita Acharyya
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Jon M. Corson
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Bikash Das
We generalize the idea of cofinite groups, due to B. Hartley, [2]. First we define cofinite spaces in general. Then, as a special situation, we study cofinite graphs and their uniform completions.The ...

Hamed Ghasemian Zoeram
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Daniel Yaqubi
A vertex of degree one is called an endvertex and the set of endvertices of G is denoted by End(G). For a positive integer k, a tree T be called kended tree if $End(T) \leq k$. In this paper, we ...

Kamal Lochan Patra
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Binod Kumar Sahoo
This paper is a survey on the upper and lower bounds for the largest eigenvalue of the Laplacian matrix, known as the Laplacian spectral radius, of a graph. The bounds are given as functions of graph ...

Radosław Cymer
In decomposition theory, extreme sets have been studied extensively due to its connection to perfect matchings in a graph. In this paper, we first define extreme sets with respect to degreematchings ...

Monther Rashed Alfuraidan
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Yusuf F. Zakariya
Let $(\Gamma,*)$ be a finite group and $S$ a possibly empty subset of $\Gamma$ containing its nonselfinvertible elements. In this paper, we introduce the inverse graph associated with $\Gamma$ whose...

Debdas Mishra
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Sushant Kumar Rout
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Puma Chandra Nayak
Here we denote a {\it diameter six tree} by $(c; a_{1}, a_{2}, \ldots, a_{m}; b_{1}, b_{2}, \ldots, b_{n}; c_{1}, c_{2}, \ldots, c_{r})$, where $c$ is the center of the tree; $a_{i}, i = 1, 2, \ldo...

Keith Driscoll
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Elliot Krop
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Michelle Nguyen
For any integer $k>0$, a tree $T$ is $k$cordial if there exists a labeling of the vertices of $T$ by $\mathbb{Z}_k$, inducing edgeweights as the sum modulo $k$ of the labels on incident vertices ...

Nader Jafari Rad
A subset $X$ of edges of a graph $G$ is called an \textit{edgedominating set} of $G$ if every edge not in $X$ is adjacent tosome edge in $X$. The edge domination number $\gamma'(G)$ of $G$ is the mini...

Seyed Morteza Mirafzal
•
Ali Zafari
Let $\Gamma=Cay(\mathbb{Z}_n, S_k)$ be the Cayley graph on the cyclic additive group $\mathbb{Z}_n$ $(n\geq 4),$ where $S_1=\{1, n1\}$, \dots , $S_k=S_ {k1}\cup\{k, nk\}$ are the inverseclosed s...

Padmapriya P.
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Veena Mathad
Let $G = (V,E)$ be a simple connected graph. Theeccentricdistance sum of $G$ is defined as$\xi^{ds}(G) =\ds\sum_{\{u,v\}\subseteq V(G)} [e(u)+e(v)] d(u,v)$, where $e(u)$ %\dsis the eccentricity of th...