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Imagine Math pp 175-185 | Cite as

Waiting for ABRACADABRA. Occurrences of Words and Leading Numbers

  • Emilio De Santis
  • Fabio Spizzichino

Abstract

In this paper we introduce the readers to the concept of “leading number”, as proposed by J. H. Conway in the seventies of the last century. The leading number, associated to a word w, is a binary vector that describes some special aspects of the structure of w. We shall see that it conveys the essential information that is needed in the analysis of the time of occurrence of w in a random sequence of letters.

Keywords

Random Sequence Integer Number Applied Probability Discrete Random Variable Classical Topic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Italia 2012

Authors and Affiliations

  • Emilio De Santis
    • 1
  • Fabio Spizzichino
    • 1
  1. 1.Department of MathematicsSapienza University of RomeItaly

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