A simple representation of subwords of the Fibonacci word

  • Authors:
  • Bartosz Walczak

  • Affiliations:
  • Department of Theoretical Computer Science, Jagiellonian University, ul. Łojasiewicza 6, 30-348 Kraków, Poland

  • Venue:
  • Information Processing Letters
  • Year:
  • 2010

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Abstract

We introduce a representation of subwords of the infinite Fibonacci word f"~ by a specific concatenation of finite Fibonacci words. It is unique and easily computable by backward processing of the given word. This provides an efficient recognition algorithm for subwords of f"~ as well as a full description of their occurrences in f"~. Our representation yields a natural notion of rank of a subword, which explains main properties of subwords of f"~ in a unified way.