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arXiv · 0903.0199

A Linear-Time Approximation Algorithm for Rotation Distance

Sean Cleary·Katherine St. John
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Abstract

Rotation distance between rooted binary trees measures the number of simple operations it takes to transform one tree into another. There are no known polynomial-time algorithms for computing rotation distance. We give an efficient, linear-time approximation algorithm, which estimates the rotation distance, within a provable factor of 2, between ordered rooted binary trees. .

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Sean Cleary, Katherine St. John. 2009-03-02. A Linear-Time Approximation Algorithm for Rotation Distance. https://arxiv.org/abs/0903.0199

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