4 search results - page 1 / 1 » Sandpile groups and spanning trees of directed line graphs |
JCT
2011
13 years 1 months ago
2011
Abstract. We generalize a theorem of Knuth relating the oriented spanning trees of a directed graph G and its directed line graph LG. The sandpile group is an abelian group associa...
ISAAC
2004
Springer
14 years 6 days ago
2004
Springer
The Steiner tree problem asks for a minimum cost tree spanning a given set of terminals S ⊆ V in a weighted graph G = (V, E, c), c : E → R+ . In this paper we consider a genera...
WADS
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. A central issue in the design of modern communication networks is the provision of Quality-of-Service (QoS) guarantees at the presence of heterogeneous users. For instanc...
COCOA
2009
Springer
13 years 11 months ago
2009
Springer
: Under water sensor network is an important research direction in computer science. There are many interesting optimization problems regarding its design, routing and applications...