270 search results - page 26 / 54 » Diameter bounds for planar graphs |
87
Voted
CORR
2007
Springer
14 years 9 months ago
2007
Springer
A barycentric mapping of a planar graph is a plane embedding in which every internal vertex is the average of its neighbours. A celebrated result of Tutte’s [16] is that if a pl...
76
Voted
JGT
2007
14 years 9 months ago
2007
It is known that for every integer k ≥ 4, each k-map graph with n vertices has at most kn − 2k edges. Previously, it was open whether this bound is tight or not. We show that ...
MFCS
1998
Springer
15 years 1 months ago
1998
Springer
It is known that a language is context-free iff it is the set of borders of the trees of recognizable set, where the border of a (labelled) tree is the word consisting of its leaf ...
ESA
2005
Springer
15 years 3 months ago
2005
Springer
Abstract. We present new approximation schemes for various classical problems of finding the minimum-weight spanning subgraph in edge-weighted undirected planar graphs that are re...
CORR
2011
Springer
14 years 4 months ago
2011
Springer
We describe a new variational lower-bound on the minimum energy configuration of a planar binary Markov Random Field (MRF). Our method is based on adding auxiliary nodes to every...