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・ Factor analysis of mixed data
・ Factor base
・ Factor cost
・ Factor D
・ Factor endowment
・ Factor graph
・ Factor H
・ Factor I
・ Factor I Deficiency
・ Factor I deficiency
・ Factor income
・ Factor IX
・ Factor market
・ Factor of automorphy
・ Factor of safety
Factor oracle
・ Factor payments
・ Factor price
・ Factor price equalization
・ Factor Prize for Southern Art
・ Factor regression model
・ Factor shares
・ Factor system
・ Factor T
・ Factor theorem
・ Factor Three
・ Factor V
・ Factor V Leiden
・ Factor VII
・ Factor VIII


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Factor oracle : ウィキペディア英語版
Factor oracle
A factor oracle is a finite state automaton that can efficiently search for factors (substrings) in a body of text. Older techniques, such as suffix trees, were time-efficient but required significant amounts of memory. Factor oracles, by contrast, can be constructed in linear time and space in an incremental fashion.〔Allauzen C., Crochemore M., Raffinot M., ''(Factor oracle: a new structure for pattern matching ); Proceedings of SOFSEM’99; Theory and Practice of Informatics.''〕
== Overview ==

Older techniques for matching strings include: suffix arrays, suffix trees, suffix automata or Directed acyclic word graphs, and factor automata (Allauzen, Crochemore, Raffinot, 1999). In 1999, Allauzen, Crochemore, and Raffinot, presented the factor oracle algorithm as a memory efficient improvement upon these older techniques for string matching and compression. Starting in the mid-2000s, factor oracles have found application in computer music, as well.〔Assayag G., Dubnov S., ''Using Factor Oracles for Machine Improvisation.'' Soft Computing - A Fusion of Foundations, Methodologies and Applications. 2004-09-01. Springer Berlin / Heidelberg〕

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