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Dynamic Construction and Quick Search Algorithms of Binary Balanced Trees with a Fidelity Criterion

Hisashi SUZUKI, Suguru ARIMOTO

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Summary :

This paper proposes () an algorithm that dynamically constructs an asymptotically-balanced binary tree to store successively-given keys without knowledge of the distribution of key occurence, and () another algorithm for quick key search over the constructed tree such that: If the tree has in memory at least a key that is inside the Δ-neighbor (in a Hamming space) of a reference key, then the algorithm can find one of such Δ-neighbor keys almost with probability 1. The memory capacity required to describe a tree in the tree construction algorithm is of order being proportional to the number l of keys already processed. For an independently and idenically distributed binary source of generating keys, the mean computation time required to update a tree for every key input can be of an order being a little higher than (log2l)2log2(log2l), and that required to search a Δ-neighbor key can be of an order being a little higher than (log2l)3.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E74-A No.9 pp.2483-2494
Publication Date
1991/09/25
Publicized
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Type of Manuscript
Special Section PAPER (Special Issue on Information Theory and Its Applications)
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