Harel, Tarjan (Linking Roots) (Lowest Common Ancestor with Linking Roots Lowest Common Ancestor)

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Time Complexity

$O(n+ m*alpha(m + n, n)$) where alpha is the inverse Ackermann function

Space Complexity

$O(n)$ words

(https://www.cs.bgu.ac.il/~segal/PAPERS2/tarj.pdf)

Description

Approximate?

Exact

Randomized?

No, deterministic

Model of Computation

Word RAM

Year

1984

Reference

https://www.semanticscholar.org/paper/Fast-Algorithms-for-Finding-Nearest-Common-Harel-Tarjan/8867d059dda279b1aed4a0301e4e46f9daf65174

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