643 search results - page 70 / 129 » Supereulerian planar graphs |
IPL
2006
13 years 9 months ago
2006
We show that computing the lexicographically first four-coloring for planar graphs is p 2hard. This result optimally improves upon a result of Khuller and Vazirani who prove this ...
ESA
1999
Springer
14 years 1 months ago
1999
Springer
We propose a fast methodology for encoding graphs with information-theoretically minimum numbers of bits. Specifically, a graph with property π is called a π-graph. If π satis...
COMBINATORICS
2000
13 years 9 months ago
2000
In this article, Temperley's bijection between spanning trees of the square grid on the one hand, and perfect matchings (also known as dimer coverings) of the square grid on ...
CORR
2008
Springer
13 years 9 months ago
2008
Springer
In Graph Minors III, Robertson and Seymour write:"It seems that the tree-width of a planar graph and the tree-width of its geometric dual are approximately equal -- indeed, w...
STACS
2000
Springer
14 years 1 months ago
2000
Springer
We clarify the computational complexity of planarity testing, by showing that planarity testing is hard for L, and lies in SL. This nearly settles the question, since it is widely...