Structural similarity within and among languages

  • Authors:
  • Edward P. Stabler;Edward L. Keenan

  • Affiliations:
  • University of California, Los Angeles, CA;University of California, Los Angeles, CA

  • Venue:
  • Theoretical Computer Science - Algebraic methods in language processing
  • Year:
  • 2003

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Abstract

Linguists rely on intuitive conceptions of structure when comparing expressions and languages. In an algebraic presentation of a language, some natural notions of similarity can be rigorously defined (e.g. among elements of a language, equivalence w.r.t. isomorphisms of the language; and among languages, equivalence w.r.t. isomorphisms of symmetry groups), but it turns out that slightly more complex and nonstandard notions are needed to capture the kinds of comparisons linguists want to make. This paper identifies some of the important notions of structural similarity, with attention to similarity claims that are prominent in the current linguistic tradition of transformational grammar.