1633 search results - page 32 / 327 » Planar Map Graphs |
DM
2007
13 years 7 months ago
2007
In this paper it is shown that a class of almost-median graphs that includes all planar almost-median graphs can be recognized in O(m log n) time, where n denotes the number of ve...
ESA
1993
Springer
13 years 11 months ago
1993
Springer
A digraph is upward planar if it has a planar drawing such that all the edges are monotone with respect to the vertical direction. Testing upward planarity and constructing upward ...
WG
2007
Springer
14 years 1 months ago
2007
Springer
We study a variation of the vertex cover problem where it is required that the graph induced by the vertex cover is connected. We prove that this problem is polynomial in chordal g...
ISAAC
2004
Springer
14 years 1 months ago
2004
Springer
We study complexity and approximation of min weighted node coloring in planar, bipartite and split graphs. We show that this problem is NP-complete in planar graphs, even if they a...
ISAAC
1998
Springer
13 years 12 months ago
1998
Springer
Abstract. We study the two-layer planarization problems that have applications in Automatic Graph Drawing. We are searching for a two-layer planar subgraph of maximumweight in a gi...