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- W327921858 abstract "AbstractWe solve an open problem related to an optimal encoding of a straight line program (SLP), a canonical form of grammar compression deriving a single string deterministically. We show that an information-theoretic lower bound for representing an SLP with n symbols requires at least 2n + logn! + o(n) bits. We then present a succinct representation of an SLP; this representation is asymptotically equivalent to the lower bound. The space is at most 2nlogρ(1 + o(1)) bits for (rho leq 2sqrt{n}), while supporting random access to any production rule of an SLP in O(loglogn) time. In addition, we present a novel dynamic data structure associating a digram with a unique symbol. Such a data structure is called a naming function and has been implemented using a hash table that has a space-time tradeoff. Thus, the memory space is mainly occupied by the hash table during the development of production rules. Alternatively, we build a dynamic data structure for the naming function by leveraging the idea behind the wavelet tree. The space is strictly bounded by 2nlogn(1 + o(1)) bits, while supporting O(logn) query and update time.KeywordsDirected Acyclic GraphProduction RuleQuery TimeNaming FunctionEntropy BoundThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
- W327921858 created "2016-06-24" @default.
- W327921858 creator A5013257860 @default.
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- W327921858 date "2013-01-01" @default.
- W327921858 modified "2023-09-27" @default.
- W327921858 title "A Succinct Grammar Compression" @default.
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- W327921858 doi "https://doi.org/10.1007/978-3-642-38905-4_23" @default.
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