Why it matters

Finger search accelerates local queries. Understanding shapes access patterns.

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The architecture

Search from finger not root.

Cost O(log d) to reach LCA + descend.

Level-linked trees support.

Finger search flowFinger positionstart pointSearch up to LCAthen descendO(log d) costd = distanceLevel-linked B-trees + finger trees + tree structures with parent pointers
Finger search.
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How it works end to end

Level-linked B-trees.

Applications: text editors + local queries.

Update maintains finger.