We introduce ω^ ̅-NED, an edit distance between infinite words, that is a natural extension of NED, the normalized edit distance between finite words. We show it is a metric on (equivalence classes of) infinite words. We provide a polynomial time algorithm to compute the distance between two ultimately periodic words, and a polynomial time algorithm to compute the distance between two regular ω-languages given by non-deterministic Büchi automata.
@InProceedings{fisman_et_al:LIPIcs.CSL.2023.20, author = {Fisman, Dana and Grogin, Joshua and Weiss, Gera}, title = {{A Normalized Edit Distance on Infinite Words}}, booktitle = {31st EACSL Annual Conference on Computer Science Logic (CSL 2023)}, pages = {20:1--20:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-264-8}, ISSN = {1868-8969}, year = {2023}, volume = {252}, editor = {Klin, Bartek and Pimentel, Elaine}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2023.20}, URN = {urn:nbn:de:0030-drops-174818}, doi = {10.4230/LIPIcs.CSL.2023.20}, annote = {Keywords: Edit Distance, Infinite Words, Robustness} }
Feedback for Dagstuhl Publishing