33 search results - page 1 / 7 » On the Power of Unambiguity in Logspace |
CORR
2010
Springer
13 years 5 months ago
2010
Springer
CORR
2008
Springer
13 years 5 months ago
2008
Springer
The isomorphism problem for planar graphs is known to be efficiently solvable. For planar 3-connected graphs, the isomorphism problem can be solved by efficient parallel algorithm...
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....
FCT
2009
Springer
13 years 9 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...
CORR
2008
Springer
13 years 5 months ago
2008
Springer
Reachability and distance computation are known to be NL-complete in general graphs, but within UL co-UL if the graphs are planar. However, finding longest paths is known to be N...