320 search results - page 6 / 64 » Parity Problems in Planar Graphs |
COCO
2006
Springer
13 years 11 months ago
2006
Springer
We study the complexity of restricted versions of s-t-connectivity, which is the standard complete problem for NL. In particular, we focus on different classes of planar graphs, o...
FSTTCS
2008
Springer
13 years 8 months ago
2008
Springer
We consider the isomorphism and canonization problem for 3-connected planar graphs. The problem was known to be L -hard and in UL ∩ coUL [TW08]. In this paper, we give a determin...
STACS
2009
Springer
14 years 2 months ago
2009
Springer
We present the first polynomial-time approximation schemes (PTASes) for the following subset-connectivity problems in edge-weighted graphs of bounded genus: Steiner tree, low-conn...
ICALP
2000
Springer
13 years 11 months ago
2000
Springer
We give an O(n log n) algorithm for computing the girth (shortest cycle) of an undirected n-vertex planar graph. Our solution extends to any graph of bounded genus. This improves u...
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...