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COCOON
2003
Springer
15 years 3 months ago
On a Conjecture on Wiener Indices in Combinatorial Chemistry
Drugs and other chemical compounds are often modeled as polygonal shapes, where each vertex represents an atom of the molecule, and covalent bonds between atoms are represented by...
Yih-En Andrew Ban, Sergei Bespamyatnikh, Nabil H. ...
BMCBI
2007
162views more  BMCBI 2007»
14 years 10 months ago
Three-Dimensional Phylogeny Explorer: Distinguishing paralogs, lateral transfer, and violation of "molecular clock" assumption w
Background: Construction and interpretation of phylogenetic trees has been a major research topic for understanding the evolution of genes. Increases in sequence data and complexi...
Namshin Kim, Christopher Lee
STOC
2003
ACM
130views Algorithms» more  STOC 2003»
15 years 10 months ago
A tight bound on approximating arbitrary metrics by tree metrics
In this paper, we show that any n point metric space can be embedded into a distribution over dominating tree metrics such that the expected stretch of any edge is O(log n). This ...
Jittat Fakcharoenphol, Satish Rao, Kunal Talwar
IWPEC
2009
Springer
15 years 4 months ago
On the Directed Degree-Preserving Spanning Tree Problem
In this paper we initiate a systematic study of the Reduced Degree Spanning Tree problem, where given a digraph D and a nonnegative integer k, the goal is to construct a spanning o...
Daniel Lokshtanov, Venkatesh Raman, Saket Saurabh,...
ASPDAC
2001
ACM
103views Hardware» more  ASPDAC 2001»
15 years 1 months ago
Efficient minimum spanning tree construction without Delaunay triangulation
Given n points in a plane, a minimum spanning tree is a set of edges which connects all the points and has a minimum total length. A naive approach enumerates edges on all pairs o...
Hai Zhou, Narendra V. Shenoy, William Nicholls