K
Kunihiko Sadakane
Researcher at University of Tokyo
Publications - 189
Citations - 13039
Kunihiko Sadakane is an academic researcher from University of Tokyo. The author has contributed to research in topics: Time complexity & Compressed suffix array. The author has an hindex of 41, co-authored 180 publications receiving 9314 citations. Previous affiliations of Kunihiko Sadakane include National Institute of Informatics & National University of Singapore.
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Ultra-succinct representation of ordered trees with applications
TL;DR: A new, conditional entropy for trees called the tree degree entropy is introduced, and a succinct tree representation with matching size is given, which is called an ultra-succinct data structure.
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Stronger Lempel-Ziv Based Compressed Text Indexing
TL;DR: Stronger Lempel-Ziv based indices (LZ-indices) are presented, improving the overall performance of the original LZ-index and achieving indices requiring (2+ε)uHk(T)+o(ulog σ) bits of space, for any constant ε>0, which makes them the smallest existing LZ -indices.
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Space---Time Trade-offs for Stack-Based Algorithms
TL;DR: This paper introduces the compressed stack technique, a method that allows to transform algorithms whose main memory consumption takes the form of a stack into memory-constrained algorithms, and gives a trade-off between the size of the workspace and running time.
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Fast relative Lempel–Ziv self-index for similar sequences
TL;DR: This work describes a new data structure based on relative Lempel–Ziv compression that is space-efficient and also supports fast pattern searching.
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The hitting and cover times of Metropolis walks
TL;DR: It is shown that the hitting and the cover times of Metropolis walks are O(fn^2) and O( fn^2logn), respectively, for any graph G of order n and any probability distribution @p such that f=max"u","v"@?"V@p"u/@ p"v<~".