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12.839  Articles
1 of 1.285 pages  |  10  records  |  more records»
Let G = (V(G),E(G)) be a graph with the nonempty vertex set V(G) and the edge set E(G). Let Zn be the group of integers modulo n and let k be a positive integer. A modular irregular labeling of a grap... see more

A retracting-free bidirectional double tracing in a graph G is a closed walk which traverses every edge exactly once in each direction and such that no edge is succeeded by the same edge in the opposite direction. Studying the class&nb... see more

In this note, we prove the conjecture of Abelson and Rosenberg, on the maximal degree of balance of a graph, with n vertices, and we characterize these maximal graphs.

Consider the following problem: Given a planar graph G, what is the maximum number p such that G has a planar straight-line drawing with p collinear vertices? This problem resides at the core of several graph drawing problems, including universal point su... see more

This paper discusses the most popular algebraic techniques and computational methods that have been used to construct large graphs with given degree and diameter.

In this note, we prove the conjecture of Abelson and Rosenberg, on the maximal degree of balance of a graph, with n vertices, and we characterize these maximal graphs.



Os mangues do litoral sul de Sergipe sobrevivem em meio à presença de tensores antropogênicos comprometedores da existência do ecossistema manguezal. Objetiva-se analisar os tensores antropogênicos que afetam os mangues Avicennia schaueriana Stapf. & ... see more

1 of 1.285 pages  |  10  records  |  more records»