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26.253  Articles
1 of 2.626 pages  |  10  records  |  more records»
A Moore (r, z, k)-mixed graph G has every vertex with undirected degree r, directed in- and out-degree z, diameter k, and number of vertices (or order) attaining the corresponding Moore bound M(r, z, k) for mixed gr... see more

A graph is a mathematical object modeling the existence of a certain relation between pairs of elements of a given set. Many of the first results concerning graphs made reference to relationships between groups of people. In this article, we comment on fo... see more

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We study the main properties of a new product of bipartite digraphs which we call Manhattan product. This product allows us to understand the subjacent product in the Manhattan street networks and can be used to built other networks with similar good prop... see more

L'entrevista amb l'escriptora cubano-americana Cristina Garciacute;a explora el tema de la identitat cubanoamericana i desvetlla la riquesa literagrave;ria que sorgeix de la fusioacute; de dues cultures, la cubana i la nord-americana, i com aquesta fusioa... see more

L'entrevista amb l'escriptora cubano-americana Cristina Garciacute;a explora el tema de la identitat cubanoamericana i desvetlla la riquesa literagrave;ria que sorgeix de la fusioacute; de dues cultures, la cubana i la nord-americana, i com aquesta fusioa... see more



Given a regular (connected) graph G=(X,E) with adjacency matrix A, d+1 distinct eigenvalues, and diameter D, we give a characterization  of when its distance matrix AD is a polynomial in A, in terms of the adjacency spectrum of G and the arithmetic (... see more

1 of 2.626 pages  |  10  records  |  more records»