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» Quasi-isometries between graphs and trees
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IPL
2006
97views more  IPL 2006»
13 years 7 months ago
A fixed-parameter tractability result for multicommodity demand flow in trees
We study an NP-hard (and MaxSNP-hard) problem in trees--Multicommodity Demand Flow--dealing with demand flows between pairs of nodes and trying to maximize the value of the routed...
Jiong Guo, Rolf Niedermeier
SODA
2004
ACM
82views Algorithms» more  SODA 2004»
13 years 9 months ago
Dynamizing static algorithms, with applications to dynamic trees and history independence
We describe a machine model for automatically dynamizing static algorithms and apply it to historyindependent data structures. Static programs expressed in this model are dynamize...
Umut A. Acar, Guy E. Blelloch, Robert Harper, Jorg...
CGF
2008
110views more  CGF 2008»
13 years 7 months ago
TimeRadarTrees: Visualizing Dynamic Compound Digraphs
The evolution of dependencies in information hierarchies can be modeled by sequences of compound digraphs with edge weights. In this paper we present a novel approach to visualize...
Michael Burch, Stephan Diehl
ALGORITHMICA
2010
95views more  ALGORITHMICA 2010»
13 years 7 months ago
Homogeneous String Segmentation using Trees and Weighted Independent Sets
We divide a string into k segments, each with only one sort of symbols, so as to minimize the total number of exceptions. Motivations come from machine learning and data mining. F...
Peter Damaschke
EUROGRAPHICS
2010
Eurographics
14 years 4 months ago
Human Motion Synthesis with Optimization-based Graphs
Continuous constrained optimization is a powerful tool for synthesizing novel human motion segments that are short. Graph-based motion synthesis methods such as motion graphs and ...
Cheng Ren, Liming Zhao, Alla Safonova