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arxiv: 0903.0199 · v2 · pith:MYSLB67Qnew · submitted 2009-03-02 · 💻 cs.DS

A Linear-Time Approximation Algorithm for Rotation Distance

classification 💻 cs.DS
keywords distancerotationalgorithmapproximationbinarylinear-timerootedtrees
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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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