Lecture 8 - CS409

Union/Find, Inverse Ackerman's Function

2/18/99


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Table of Contents

Example Problem: Connectivity

Union and Find

Union/Find using Reverse Trees

An Improvement: Weighted Union

Weighted Union Lemmas

Weighted Union + Path Compression

Yes, It Helps

Ackerman’s Function

Definition for a(n)

Lower Envelope of Line Segments

Author: Paul Chew

Home Page: http://www.cs.cornell.edu/cs409-sp99/