WG
2004
Springer
14 years 3 months ago
2004
Springer
Abstract. Assume that each vertex of a graph G is assigned a nonnegative integer weight and that l and u are nonnegative integers. One wish to partition G into connected components...
WG
2004
Springer
14 years 3 months ago
2004
Springer
We consider the NP-complete problem of deciding whether an input graph on n vertices has k vertex-disjoint copies of a fixed graph H. For H = K3
WG
2004
Springer
14 years 3 months ago
2004
Springer
An undirected graph is a treelike comparability graph if it admits a transitive orientation such that its transitive reduction is a tree. We show that treelike comparability graphs...
WG
2004
Springer
14 years 3 months ago
2004
Springer
In this paper we study collective additive tree spanners for families of graphs that either contain or are contained in AT-free graphs. We say that a graph G = (V, E) admits a sys...
WG
2004
Springer
14 years 3 months ago
2004
Springer
The Phylogenetic kth Root Problem (PRk) is the problem of finding a (phylogenetic) tree T from a given graph G = (V, E) such that (1) T has no degree-2 internal nodes, (2) the ex...
WG
2004
Springer
14 years 3 months ago
2004
Springer
In portable multimedia systems a number of communicating tasks has to be performed on a set of heterogeneous processors. This should be done in an energy-efficient way. We give th...
WG
2004
Springer
14 years 3 months ago
2004
Springer
We show how to use split decomposition to compute the weighted clique number and the chromatic number of a graph and we apply these results to some classes of graphs. In particular...
WG
2004
Springer
14 years 3 months ago
2004
Springer
We propose a two-phase heuristic for crossing reduction in circular layouts. While the first algorithm uses a greedy policy to build a good initial layout, an adaptation of the si...
WG
2004
Springer
14 years 3 months ago
2004
Springer
The family of well-orderly maps is a family of planar maps with the property that every connected planar graph has at least one plane embedding which is a well-orderly map. We show...
WG
2004
Springer
14 years 3 months ago
2004
Springer