17 search results - page 1 / 4 » Planar Graph Isomorphism is in Log-Space |
COCO
2009
Springer
13 years 11 months ago
2009
Springer
Graph Isomorphism is the prime example of a computational problem with a wide difference between the best known lower and upper bounds on its complexity. There is a significant ...
COCO
2010
Springer
13 years 8 months ago
2010
Springer
Designing algorithms that use logarithmic space for graph reachability problems is fundamental to complexity theory. It is well known that for general directed graphs this problem...
FCT
2009
Springer
13 years 8 months ago
2009
Springer
We show that the reachability problem for directed graphs that are either K3,3-free or K5-free is in unambiguous log-space, UL coUL. This significantly extends the result of Bour...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We make progress in understanding the complexity of the graph reachability problem in the context of unambiguous logarithmic space computation; a restricted form of nondeterminism....
MST
2011
12 years 7 months ago
2011
We study the complexity of testing if two given matroids are isomorphic. The problem is easily seen to be in Σ p 2. In the case of linear matroids, which are represented over pol...