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LATIN
2000
Springer
13 years 9 months ago
The LCA Problem Revisited
We present a very simple algorithm for the Least Common Ancestor problem. We thus dispel the frequently held notion that an optimal LCA computation is unwieldy and unimplementable...
Michael A. Bender, Martin Farach-Colton
ECCC
2006
112views more  ECCC 2006»
13 years 5 months ago
Faster algorithms for finding lowest common ancestors in directed acyclic graphs
We present two new methods for finding a lowest common ancestor (LCA) for each pair of vertices of a directed acyclic graph (dag) on n vertices and m edges. The first method is su...
Artur Czumaj, Miroslaw Kowaluk, Andrzej Lingas
CPM
2006
Springer
182views Combinatorics» more  CPM 2006»
13 years 9 months ago
Theoretical and Practical Improvements on the RMQ-Problem, with Applications to LCA and LCE
The Range-Minimum-Query-Problem is to preprocess an array such that the position of the minimum element between two specified indices can be obtained efficiently. We present a dire...
Johannes Fischer, Volker Heun
SADM
2010
141views more  SADM 2010»
13 years 2 days ago
A parametric mixture model for clustering multivariate binary data
: The traditional latent class analysis (LCA) uses a mixture model with binary responses on each subject that are independent conditional on cluster membership. However, in many pr...
Ajit C. Tamhane, Dingxi Qiu, Bruce E. Ankenman
WWW
2010
ACM
14 years 5 days ago
LCA-based selection for XML document collections
In this paper, we address the problem of database selection for XML document collections, that is, given a set of collections and a user query, how to rank the collections based o...
Georgia Koloniari, Evaggelia Pitoura