| Issue |
RAIRO-Theor. Inf. Appl.
Volume 42, Number 1, January-March 2008
A nonstandard spirit among computer scientists:a tribute to Serge Grigorieff at the occasion of his 60th birthday
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|---|---|---|
| Page(s) | 5 - 20 | |
| DOI | https://doi.org/10.1051/ita:2007052 | |
| Published online | 18 January 2008 | |
Tree inclusion problems
1
LACL EA 4213, Université Paris Est, Route
forestière Hurtault, 77300 Fontainebleau, France;
cegielski@univ-paris12.fr
2
LIAFA, UMR 7089 and Université Paris 6, 2 place Jussieu,
75254 Paris Cedex 5, France; ig@liafa.jussieu.fr
3
Steklov Institute of Mathematics, Fontanka 27, St.
Petersburg, 191023, Russia; yumat@pdmi.ras.ru
Given two trees (a target T and a pattern P) and a natural number w, window embedded subtree problems consist in deciding whether P occurs as an embedded subtree of T and/or finding the number of size (at most) w windows of T which contain pattern P as an embedded subtree. P is an embedded subtree of T if P can be obtained by deleting some nodes from T (if a node v is deleted, all edges adjacent to v are also deleted, and outgoing edges are replaced by edges going from the parent of v (if it exists) to the children of v). Deciding whether P is an embedded subtree of T is known to be NP-complete. Our algorithms run in time O(|T|22|P|) where |T| (resp. |P|) is the size of T (resp. P).
Mathematics Subject Classification: 68Q25 / 68W05
Key words: Subtree inclusion / algorithm
© EDP Sciences, 2007
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