281 search results - page 3 / 57 » The Complexity of Planar Counting Problems |
FSTTCS
2005
Springer
14 years 1 months ago
2005
Springer
We investigate the s-t-connectivity problem for directed planar graphs, which is hard for L and is contained in NL but is not known to be complete. We show that this problem is log...
COCOON
1999
Springer
13 years 12 months ago
1999
Springer
Abstract. Hierarchical graphs are an important class of graphs for modelling many real applications in software and information visualization. In this paper, we shall investigate t...
APAL
2006
13 years 7 months ago
2006
Parameterized complexity has, so far, been largely con ned to consideration of computational problems as decision or search problems. However, it is becoming evident that the param...
COCO
2010
Springer
13 years 11 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...
CSR
2008
Springer
13 years 9 months ago
2008
Springer
Abstract. While visibly pushdown languages properly generalise regular languages and are properly contained in deterministic context-free languages, the complexity of their members...