Authors
Kaizhong Zhang, Tao Jiang
Publication date
1994/3/11
Journal
Information Processing Letters
Volume
49
Issue
5
Pages
249-254
Publisher
Elsevier
Description
Given two rooted, labeled, and unordered trees, we consider the problem of finding the largest common sub-tree and the problem of finding the edit distance between them. We show that both problems are MAX SNP-hard. This means that neither problem has a polynomial time approximation scheme (PTAS) unless P = NP.
Total citations
Scholar articles
K Zhang, T Jiang - Information Processing Letters, 1994