6 citations · 7 across the 11 of their papers we have counts for
10 papers · 1 filter
On -unimodality of radius functions in graphs: structure and algorithms
Jérémie Chalopin, Victor Chepoi, Feodor Dragan +2
For every weight assignment to the vertices in a graph , the radius function maps every vertex of to its largest weighted distance to the other vertices. The cente…
Complexity Gaps between Point and Interval Temporal Graphs for some Reachability Problems
Guillaume Aubian, Filippo Brunelli, Feodor F Dragan +4
Temporal graphs arise when modeling interactions that evolve over time. They usually come in several flavors, depending on the number of parameters used to describe the temporal as…
-Metric Graphs: Radius, Diameter and all Eccentricities
Feodor F. Dragan, Guillaume Ducoffe
We extend known results on chordal graphs and distance-hereditary graphs to much larger graph classes by using only a common metric property of these graphs. Specifically, a graph…
Fast deterministic algorithms for computing all eccentricities in (hyperbolic) Helly graphs
Feodor F. Dragan, Guillaume Ducoffe, Heather M. Guarnera
A graph is Helly if every family of pairwise intersecting balls has a nonempty common intersection. The class of Helly graphs is the discrete analogue of the class of hyperconvex m…
A story of diameter, radius and Helly property
Feodor F. Dragan, Guillaume Ducoffe
A graph is Helly if every family of pairwise intersecting balls has a nonempty common intersection. Motivated by previous work on dually chordal graphs and graphs of bounded distan…
Fast approximation of centrality and distances in hyperbolic graphs
Victor Chepoi, Feodor F. Dragan, Michel Habib +2
We show that the eccentricities (and thus the centrality indices) of all vertices of a -hyperbolic graph can be computed in linear time with an additive one-sided erro…