Weighted tree automata and tree transducers extend the classical model of tree automata and tree transducers. An unweighted tree automaton calls a binary decision for each input tree: either the automaton accepts the tree or it rejects the tree. In the weighted case, a quantitative decision can be made (e.g. with which confidence can the input tree be accepted; how often does a certain symbol occur in the input tree; etc.). Such a quantitative decision is useful, for example, in natural language processing, where several accepted input trees can now be ordered according to their weight (quality, etc.).
We are interested in the theoretical foundations of weighted tree automata and tree transducers. In particular, we did and still do research on closure properties, determinization and minimization, learning of tree automata, and equivalent logical formalisms.
Slides about the topic
 slides presented at ATANLP 2012 by Heiko Vogler
 slides presented at Theorietag October 3, 2012 in Prague by Heiko Vogler
 slides presented at DLT 2013 in Paris by Heiko Vogler
Contact

Prof. Dr.Ing. habil. Dr. h.c./Univ. Szeged
Heiko Vogler
Phone: +49 (0) 351 46338232
Fax: +49 (0) 351 46337959