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CORR
2010
Springer
104views Education» more  CORR 2010»
13 years 10 months ago
Approximating the minimum directed tree cover
Given a directed graph G with non negative cost on the arcs, a directed tree cover of G is a directed tree such that either head or tail (or both of them) of every arc in G is touc...
Viet Hung Nguyen
ANTS
2008
Springer
115views Algorithms» more  ANTS 2008»
14 years 20 days ago
Abelian Varieties with Prescribed Embedding Degree
We present an algorithm that, on input of a CM-field K, an integer k 1, and a prime r 1 mod k, constructs a q-Weil number OK corresponding to an ordinary, simple abelian variety ...
David Freeman, Peter Stevenhagen, Marco Streng
JCT
2007
96views more  JCT 2007»
13 years 10 months ago
Induced subgraphs of Ramsey graphs with many distinct degrees
An induced subgraph is called homogeneous if it is either a clique or an independent set. Let hom(G) denote the size of the largest homogeneous subgraph of a graph G. In this shor...
Boris Bukh, Benny Sudakov
ISAAC
2005
Springer
131views Algorithms» more  ISAAC 2005»
14 years 4 months ago
Orthogonal Drawings of Series-Parallel Graphs with Minimum Bends
In an orthogonal drawing of a planar graph G, each vertex is drawn as a point, each edge is drawn as a sequence of alternate horizontal and vertical line segments, and any two edge...
Xiao Zhou, Takao Nishizeki
GECCO
2006
Springer
175views Optimization» more  GECCO 2006»
14 years 2 months ago
An ant-based algorithm for finding degree-constrained minimum spanning tree
A spanning tree of a graph such that each vertex in the tree has degree at most d is called a degree-constrained spanning tree. The problem of finding the degree-constrained spann...
Thang Nguyen Bui, Catherine M. Zrncic