
doi: 10.7151/dmgt.2325
Given an edge-colored graph, a rainbow path is a path whose edges are all colored by distinct colors. A geodesic is a path of minimum length between two vertices. A (strong) rainbow edge coloring of a graph \(G\) is an edge coloring where any two vertices of \(G\) are joined by a rainbow path (geodesic). The (strong) rainbow connection number of \(G\) is the smallest number of colors in a (strong) rainbow edge coloring of \(G\). This notion was introduced by \textit{G. Chartrand} et al. [Math. Bohem. 133, No. 1, 85--98 (2008; Zbl 1199.05106)]. As pointed out in the paper, rainbow connectivity has been generalized in many ways. In this paper, the authors consider a local variant of rainbow connectivity as follows. A (strong) \(d\)-local rainbow coloring of \(G\) is an edge coloring such that there is a rainbow path (geodesic) between any two vertices at distance at most \(d\) in \(G\), and the (strong) \(d\)-local rainbow connection number of \(G\) is the smallest number of colors in such an edge coloring of \(G\). The authors prove some basic properties of this edge coloring invariant and investigate it for basic families of graphs such as trees and cycles. Moreover, they characterize for which integers \(a\), \(b\) there is a connected graph with \(d\)-local rainbow connection number \(a\) and strong \(d\)-local rainbow connection number \(b\).
rainbow connection, Connectivity, Distance in graphs, rainbow connectivity, line graph, Coloring of graphs and hypergraphs, chromatic number, 05c15, 05c38, QA1-939, edge coloring, 05c40, Paths and cycles, Mathematics
rainbow connection, Connectivity, Distance in graphs, rainbow connectivity, line graph, Coloring of graphs and hypergraphs, chromatic number, 05c15, 05c38, QA1-939, edge coloring, 05c40, Paths and cycles, Mathematics
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 1 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
