NII Technical Report (NII-2015-004E)

Title Distributional Learning of Some Nonlinear Tree Grammars
Authors Alexander Clark, Makoto Kanazawa, Gregory M. Kobele, and Ryo Yoshinaka
Abstract A key component of Clark and Yoshinaka's distributional learning algorithms is the extraction of substructures and contexts contained in the input data. This problem often becomes intractable with nonlinear grammar formalisms due to the fact that more than polynomially many substructures and/or contexts may be contained in each object. Previous works on distributional learning of nonlinear grammars avoided this difficulty by restricting the substructures or contexts that are made available to the learner. In this paper, we identify two classes of nonlinear tree grammars for which the extraction of substructures and contexts can be performed in polynomial time, and which, consequently, admit successful distributional learning in its unmodified, original form.
Language English
Published Oct 6, 2015
Pages 37p
PDF File 15-004E.pdf

NII Technical Reports
National Institute of Informatics