Browsing by Author "Muntaner Batle, Francesc Antoni"
Now showing items 1-20 of 22
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A new application of the $\otimes_h$-product to $\alpha$-labelings
(2015)
Article
Open AccessThe weak tensor product was introduced by Snevily as a way to construct new graphs that admit a-labelings from a pair of known a-graphs. In this article, we show that this product and the application to a-labelings can be ... -
A new labeling construction from the -product
(2017-08-01)
Article
Open AccessThe ¿h-product that is referred in the title was introduced in 2008 as a generalization of the Kronecker product of digraphs. Many relations among labelings have been obtained since then, always using as a second factor a ... -
A note on the degree sequences of graphs with restrictions
(2008-01-15)
Article
Open AccessDegree sequences of some types of graphs will be studied and characterized in this paper. -
Bi-magic and other generalizations of super edge-magic labelings
(2011-06-15)
Article
Restricted access - publisher's policyIn this paper, we use the product ⊗h in order to study super edge-magic labelings, bi-magic labelings and optimal k-equitable labelings. We establish, with the help of the product ⊗h, new relations between super edge-magic ... -
Bounds on the size of super edge-magic graphs depending on the girth
(2009-12-13)
Research report
Open AccessLet G = (V,E) be a graph of order p and size q. It is known that if G is super edge-magic graph then q 2p−3. Furthermore, if G is super edge-magic and q = 2p−3, then the girth of G is 3. It is also known that if the ... -
Connectivity and other invariants of generalized products of graphs
(2015-02-24)
Article
Open AccessFigueroa-Centeno et al. [4] introduced the following product of digraphs let D be a digraph and let G be a family of digraphs such that V (F) = V for every F¿G. Consider any function h:E(D)¿G. Then the product D¿hG is the ... -
Distance labelings: a generalization of Langford sequences
(2016-01-05)
Article
Open AccessA Langford sequence of order m and defect d can be identified with a labeling of the vertices of a path of order 2m in which each labeled from d up to d + m - 1 appears twice and in which the vertices that have been label ... -
Enumerating super edge-magic labelings for some types of path-like trees
(2010-06-02)
Article
Open AccessThe main goal of this paper is to use a variation of the Kronecker product of matrices in order to obtain lower bounds for the number of non isomorphic super edge-magic labelings of some types of path-like trees. As a ... -
Enumerating super edge-magic labelings for the union of non-isomorphic graphs
(2011-06-15)
Article
Open AccessA super edge-magic labeling of a graph G=(V,E) of order p and size q is a bijection f:V ∪E→{i}p+qi=1 such that: (1) f(u)+f(uv)+f(v)=k for all uv∈E; and (2) f(V )={i}pi=1. Furthermore, when G is a linear forest, the super ... -
Labeling Generating Matrices
(2006-09)
Article
Open AccessThis paper is mainly devoted to generate (special)(super) edge-magic labelings of graphs using matrices. Matrices are used in order to find lower bounds for the number of non-isomorphic (special)(super) edge-magic ... -
Langford sequences and a product of digraphs
(2015-12-07)
Article
Open AccessSkolem and Langford sequences and their many generalizations have applications in numerous areas. The ¿h-product is a generalization of the direct product of digraphs. In this paper we use the ¿h-product and super edge-magic ... -
Magic coverings and the Kronecker product
(2009-12-11)
Article
Open AccessIn this paper we study a relationship existing among (super) magic coverings and the well known Kronecker product of matrices. We also introduce the concept of Zn–property for digraphs in order to study this relation ... -
Magic coverings and the Kronecker product
(2014-11-01)
Article
Restricted access - publisher's policyIn this paper we study a relationship existing among (super) magic coverings and the well known Kronecker product of matrices. We also introduce the concept of Z(n)-property for digraphs in order to study this relation ... -
On the beta-number of forests with isomorphic components
(2018)
Article
Open AccessThe beta-number, ß (G), of a graph G is defined to be either the smallest positive integer n for which there exists an injective function f : V (G) ¿ {0, 1, . . . , n} such that each uv ¿ E (G) is labeled |f (u) - f (v)| ... -
On the structure of path-like trees
(2007)
Article
Open AccessWe study the structure of path-like trees. In order to do this, we introduce a set of trees that we call expandable trees. In this paper we also generalize the concept of path-like trees and we call such generalization ... -
Perfect (super) Edge-Magic Crowns
(2017-01-06)
Article
Open AccessA graph G is called edge-magic if there is a bijective function f from the set of vertices and edges to the set {1,2,…,|V(G)|+|E(G)|} such that the sum f(x)+f(xy)+f(y) for any xy in E(G) is constant. Such a function is ... -
Perfect edge-magic graphs
(2014-01-01)
Article
Restricted access - publisher's policyThe study of the possible valences for edge-magic labelings of graphs has motivated us to introduce the concept of perfect edge-magic graphs. Intuitively speaking, an edge-magic graph is perfect edge-magic if all possible ... -
Problemas abiertos sobre etiquetamientos super edge-magic y temas relacionados
(2010)
Conference report
Open AccessEl tema de los etiquetamientos de grafos ha experimentado un fuerte impulso en los últimos 40 años, muestra de ello son los dos libros dedicados en exclusiva a ellos, un completísimo artículo ”survey” y más de 1000 ... -
Queen Labelings
(2008)
Article
Open AccessWe introduce and investigate the concept of Queen labeling a digraph and its connection to the well-known n-queens problem. In the general case we obtain an upper bound on the size of a queen graph and show that it is ... -
Rainbow eulerian multidigraphs and the product of cycles
(2016-01-01)
Article
Open AccessAn arc colored eulerian multidigraph with l colors is rainbow eulerian if there is an eulerian circuit in which a sequence of l colors repeats. The digraph product that refers the title was introduced by Figueroa-Centeno ...
