The left-right-imbalance of binary search trees

  • Authors:
  • Markus Kuba;Alois Panholzer

  • Affiliations:
  • Institut für Diskrete Mathematik und Geometrie, Technische Universität Wien, Wiedner Hauptstr. 8-10/104, 1040 Wien, Austria;Institut für Diskrete Mathematik und Geometrie, Technische Universität Wien, Wiedner Hauptstr. 8-10/104, 1040 Wien, Austria

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2007

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Abstract

We present a detailed study of left-right-imbalance measures for random binary search trees under the random permutation model, i.e., where binary search trees are generated by random permutations of {1,2,...,n}. For random binary search trees of size n we study (i) the difference between the left and the right depth of a randomly chosen node, (ii) the difference between the left and the right depth of a specified node j=j(n), and (iii) the difference between the left and the right pathlength, and show for all three imbalance measures limiting distribution results.