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  1. Journal of Logic, Language and Information
  2. Journal of Logic, Language and Information : Volume 13
  3. Journal of Logic, Language and Information : Volume 13, Issue 4, March 2004
  4. Learning Local Transductions Is Hard
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Journal of Logic, Language and Information : Volume 26
Journal of Logic, Language and Information : Volume 25
Journal of Logic, Language and Information : Volume 24
Journal of Logic, Language and Information : Volume 23
Journal of Logic, Language and Information : Volume 22
Journal of Logic, Language and Information : Volume 21
Journal of Logic, Language and Information : Volume 20
Journal of Logic, Language and Information : Volume 19
Journal of Logic, Language and Information : Volume 18
Journal of Logic, Language and Information : Volume 17
Journal of Logic, Language and Information : Volume 16
Journal of Logic, Language and Information : Volume 15
Journal of Logic, Language and Information : Volume 14
Journal of Logic, Language and Information : Volume 13
Journal of Logic, Language and Information : Volume 13, Issue 3, December 2004
Journal of Logic, Language and Information : Volume 13, Issue 1, September 2004
Journal of Logic, Language and Information : Volume 13, Issue 4, March 2004
Introduction ( Journal of Logic, Language and Information , Volume 13 , Issue 4 )
Scope Dominance with Monotone Quantifiers over Finite Domains
Global Index Grammars and Descriptive Power
On the Expressive Power of Abstract Categorial Grammars: Representing Context-Free Formalisms
Learning Local Transductions Is Hard
Querying Linguistic Treebanks with Monadic Second-Order Logic in Linear Time
A Mathematical Analysis of Pānini’s Śivasūtras
Exhaustive Interpretation of Complex Sentences
Relationale Grammatik
The Syntactic Process: Language, Speech, and Communication, Mark Steedman
Language Modeling for Information Retrieval
Index of Authors of Volume 13
Contents of Volume 13 ( Journal of Logic, Language and Information , Volume 13 , Issue 4 )
Instructions for Authors ( Journal of Logic, Language and Information , Volume 13 , Issue 4 )
Journal of Logic, Language and Information : Volume 13, Issue 2, March 2004
Journal of Logic, Language and Information : Volume 12
Journal of Logic, Language and Information : Volume 11
Journal of Logic, Language and Information : Volume 10
Journal of Logic, Language and Information : Volume 9
Journal of Logic, Language and Information : Volume 8
Journal of Logic, Language and Information : Volume 7
Journal of Logic, Language and Information : Volume 6

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Learning Local Transductions Is Hard

Content Provider Springer Nature Link
Author Jansche, Martin
Copyright Year 2004
Abstract Local deterministic string-to-string transductions arise in natural language processing (NLP) tasks such as letter-to-sound translation or pronunciation modeling. This class of transductions is a simple generalization of morphisms of free monoids; learning local transductions is essentially the same as inference of certain monoid morphisms. However, learning even a highly restricted class of morphisms, the so-called fine morphisms, leads to intractable problems: deciding whether a hypothesized fine morphism is consistent with observations is an NP-complete problem; and maximizing classification accuracy of the even smaller class of alphabetic substitution morphisms is APX-hard. These theoretical results provide some justification for using the kinds of heuristics that are commonly used for this learning task.
Starting Page 439
Ending Page 455
Page Count 17
File Format PDF
ISSN 09258531
Journal Journal of Logic, Language and Information
Volume Number 13
Issue Number 4
e-ISSN 15729583
Language English
Publisher Kluwer Academic Publishers
Publisher Date 2004-01-01
Publisher Place Dordrecht
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Boolean satisfiability combinatorial optimization formal languages letter-to-sound rules machine learning natural language processing NP completeness rational transductions Logic Semantics Information Systems Applications (incl.Internet)
Content Type Text
Resource Type Article
Subject Philosophy Computer Science Linguistics and Language
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