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WISE
2007
Springer
14 years 2 months ago
On Tree Pattern Query Rewriting Using Views
We study and present our findings on two closely related problems on xpath rewriting using views when both the view and the query are tree patterns involving /,// and []. First, g...
Junhu Wang, Jeffrey Xu Yu, Chengfei Liu
FOCS
1992
IEEE
13 years 12 months ago
Quadratic Dynamical Systems (Preliminary Version)
The main purpose of this paper is to promote the study of computational aspects, primarily the convergence rate, of nonlinear dynamical systems from a combinatorial perspective. W...
Yuri Rabinovich, Alistair Sinclair, Avi Wigderson
FOCS
2002
IEEE
14 years 22 days ago
A Dichotomy Theorem for Constraints on a Three-Element Set
The Constraint Satisfaction Problem (CSP) provides a common framework for many combinatorial problems. The general CSP is known to be NP-complete; however, certain restrictions on...
Andrei A. Bulatov
KDD
2005
ACM
157views Data Mining» more  KDD 2005»
14 years 8 months ago
A fast kernel-based multilevel algorithm for graph clustering
Graph clustering (also called graph partitioning) -- clustering the nodes of a graph -- is an important problem in diverse data mining applications. Traditional approaches involve...
Inderjit S. Dhillon, Yuqiang Guan, Brian Kulis
TCBB
2010
106views more  TCBB 2010»
13 years 2 months ago
Quantifying the Degree of Self-Nestedness of Trees: Application to the Structural Analysis of Plants
In this paper we are interested in the problem of approximating trees by trees with a particular self-nested structure. Self-nested trees are such that all their subtrees of a give...
Christophe Godin, Pascal Ferraro