Show that in an undirected graph, classifying an edge .u; / as a tree edge or a back edge according to whether .u; / or .; u/ is encountered first during the depth-first search is equivalent to classifying it according to the ordering of the four types in the classification scheme.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Show that in an undirected graph, classifying an edge .u; / as a tree edge or a back edge according to whether .u; / or .; u/ is encountered first during the depth-first search is equivalent to classifying it according to the ordering of the four types in the classification scheme.

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