منابع مشابه
Statistical Properties of Factor Oracles
Factor and suffix oracles have been introduced in [1] in order to provide an economic and efficient solution for storing all the factors and suffixes respectively of a given text. Whereas good estimations exist for the size of the factor/suffix oracle in the worst case, no average-case analysis has been done until now. In this paper, we give an estimation of the average size for the factor/suff...
متن کاملTest Oracles Using Statistical Methods
The oracle problem is addressed for random testing and testing of randomized software. The presented Statistical Oracle is a Heuristic Oracle using statistical methods, especially statistical tests. The Statistical Oracle is applicable in case there are explicit formulae for the mean, the distribution, and so on, of characteristics computable from the test result. However, the present paper onl...
متن کاملConstructing Factor Oracles
A factor oracle is a data structure for weak factor recognition. It is an automaton built on a string p of length m that is acyclic, recognizes at least all factors of p, has m+1 states which are all final, and has m to 2m−1 transitions. In this paper, we give two alternative algorithms for its construction and prove the constructed automata to be equivalent to the automata constructed by the a...
متن کاملThe Structure of Factor Oracles
The factor oracle is a relatively new data structure for the set of factors of a string. It has been introduced by Allauzen, Crochemore, and Raffinot in 1999. It may recognize nonfactors (hence the name “oracle”) but its implementational simplicity and experimental behaviour are stunning; factor oracle based string matching has been conjectured optimal on average. However, its structure is not ...
متن کاملError analysis of factor oracles
Factor oracles [1] constructed from a given text are deterministic acyclic automata accepting all substrings of the text. Factor oracles are more space economical and easy to implement than similar data structures such as suffix tree[6]. There is, however, some drawback; a factor oracle may accept strings not in the text, which we call a error acceptance. In this paper, we charactrize factor or...
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ژورنال
عنوان ژورنال: Journal of Discrete Algorithms
سال: 2011
ISSN: 1570-8667
DOI: 10.1016/j.jda.2010.10.001