Question
We are given a DFS tree. Direct the tree edges away from the root. Show that each vertex has a directed path to the root
We are given a DFS tree. Direct the tree edges away from the root. Show that each vertex has a directed path to the root that uses at most one backward edge, if and only if all the leaves have an edge to the root.
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The Structure Of The Relational Database Model
Authors: Jan Paredaens ,Paul De Bra ,Marc Gyssens ,Dirk Van Gucht
1st Edition
3642699588, 978-3642699580
